What does this mean then?
Watching one fight certainly proves more than appealing to the authority of a top kickboxer. I already know that good thais can come into kickboxing and wreck shop, there is already a large enough sample size to draw that conclusion. It's other people on here who seem to be in total denial. But if you want to talk about drawing unreasonable conclusions from one fight, you are the one who keeps bringing up the Sangmanee fight over and over again; like it means something in the larger scheme of things. It wasn't even a kickboxing bout.
If he can give QJL a good fight, given who he is and where he is at in his career, then what would a good thai who was actually close to their physical prime be able to do? Also the question wasn't whether someone can be the same fighter as Sittichai, although I am quite confident that there are many fighters who can do exactly what Sittichai did, but whether they can be successful in kickboxing; which is obviously a lower standard.
Buakaw, Sittichai, Kaew, Superbon, Yodsanklai, etc. all got lucky and hit the international kickfighting jackpot. But instead of being viewed for what they were, a couple of guys who got moved from a shark tank to a minnow tank, they were retroactively declared to be muay thai gods without peer.