i think diff arts work for diff reasons, it can be a matter of physical ability, tendencies, preference, work ethic or creativity; not everything works for everyone because everything is not for everyone.
To me the value of an art isn't that everyone can use it in its entirety so much as you can take something of value that can enhance your skills and abilities in another discipline or can give you a whole new set of skills/abilities to work w/as a result of your time spent in that art.
most arts have to be modified, most tech have to be modified depending on the circumstance, your build, abilities and your opp; that is where the value or ability of the person comes into play in the effectiveness of the art.
if a guy uses mt and gets koed, noone says mt stinks; they say that guy was a lousy mt practitioner and this is why he got leveled, an the same guy who can't use mt effectively at all might use karate and run through guys left and right. As karate might play to his strengths, skills, tendencies better or a guy who can't do sh*t using karate might use boxing and all of a sudden start running clinics on everyone.
just cus U can't make it work, doesn't mean it doesn't or can't; it means you can't make it work. I bet alot of guys here can't use the philly shell, does that mean it doesnt work either; most guys here can't use shotokan worth a damn, does that mean it doesn't work either..no. The art may have some failings, but every art does; more times than not its the practitioner moreso than the art that fails.
another point is just because a pro mma guy can handle a guy doing wing chun on the feet, doesn't mean that you (non pro-recreational martial artist or hobbyist can).
and finally we all base our opinions on what we have seen, or experienced; if you say wc sucks its cus you either haven't been impressed by what you have seen or because a guy u sparred got his ass mashed up by u.
that is what makes YOUR opinion legitimate, just like in all tma discussions; a million guys come on here and say im not that good at bjj boxing mt or kickboxing and i killed the wc karate kung fu tkd hapkido practitioner.
but if someone who takes those arts says the same from the opp perspective, then we question the skills of the mt wrestler boxer bjj or kickboxer.
all any of us can speak on is our experience, an some of us have broader experiences than other; read the post and you can figure it out really easily, i have had the chance to spar amateur boxers/pro boxers-kickboxers-mt-shotokan- kyokushin-goju ryu-kenpo-tkd-wc-kung fu practitioners; an in my estimation every one of those arts can and will be effective, but all the practitioners (as a result of holes in their arts or because of the artist limitations) can be solved and neutralized.
wing chun can work, as most tma can, if trained under pressure and w/an open mind; in regards to diff timings counters defenses offenses and strategies applied by other arts. AN AS IS SAY TO EVERYONE WHO BASHES THE EFFECTIVENESS OF TMA'S; MAYBE I JUST KNOW A BETTER CLASS OF PRACTITIONER OR A BETTER CLASS OF FIGHTER, cus the majority of tma type guys i know would handle the majority of equally skilled mma striking practitioners, an its based on what i have seen them do. AND its based on the success or lackthereof i had against the holy trinity of mma (MT/KB/BX) and the success or lackthereof i had against guys doing tma's.
the issue of effectiveness is rarely skills; its often conditioning, i.e. the amount of abuse each is trained to take and distribute, as well as the frequency of sparring. Almost every kb-mt-bx gym/practitioner has alot of those things; you have to LOOK for tma's that do the same.
an while im no pro or virtuoso on the feet, i have had the pleasure of doing some work w/one of the gentleman who is defending wing chun, an i can speak matter of factly that a)he does have experience and a good skillset in the mainstream arts (boxing kb mt) and b)he can apply wing chun effectively w/in the context of live sparring and against a non wing chun practitioner (WHO HAS EXP SPARRING non tma types). Is it the same stance, no; but it is the same principles and overall strategies and techniques... and they were effective, he also showed me some things that im gonna add to my repetoire to maybe widen some of the things i can do or make the things i do more eff.
but since i don't fight ufc - strikeforce- dream- sengoku-wec or bellator i guess my opinion doesn't matter much and i guess i don't know very much; even though people who have any idea about striking (philosophies-tech-strategies) can read my posts and know that i in fact know alot about all 4s things in regards to a myriad of styles.