I would generally agree....but, as you know, this criticism doesn't apply to Tillman, since he re-enlisted after becoming a millionaire. For someone with little education, professional experience, or overall ability, the military is a great, great career opportunity, as it opens up a lot of doors and yields silly amounts of social prestige. But Tillman already had a million-dollar contract and lots of social prestige on account of being a professional athlete.
Of course many respect him more and rightfully so. I don't think he made the right choice, but he made it to serve a higher purpose than his own enrichment. By all accounts, Tillman was a extraordinary person.
Also, he was a liberal and, during his tour, became very critical of the legality of the war. I found that very surprising after the Republicans appropriated his story and made him into this right-wing uber-patriot-type.
https://www.sfchronicle.com/49ers/article/Pat-Tillman-s-family-clarifies-his-legacy-12235077.php
https://theintercept.com/2017/09/28/pat-tillman-nfl-protest-death-army-disgrace/