1. While you raise a good point, the issue of Trent Lougheed's academics is moot... at least where I'm concerned. I don't think anyone (as stated before) is discussing his personal situation, the discussion is on the larger Pro League vs. college argument. That argument assumes that either option is a viable one.
2. US College is also a stepping stone... every years scores of American college players go on to sign professional contracts in MLS and Europe.. all of which are better options than the Pro League. How many Pro League players go on to sign contracts outside of TnT every year?
3. Look at the guys who made it from TnT to a foreign contract... most of them were already in their mid-20s, the same age as the college graduates. It's not like we have teens signing contracts every day coming from the Pro League. If either way, the player isn't going to get recognized until his mid-20s it would seem wise to hedge your bets and get your degree as well.
Also, a strong argument could be made that playing football and focusing on school (particularly at a top-flight program such as UCONN), would still allow for better professional development than anything the Pro League has to offer. I don't know personally so can't say what JP's facilities and training, dietary/nutrition program etc. is like... but I know that UCONN's is no joke.
4. Could he get an education thru GATE etc., I'm sure he can. Would he take advantage of that opportunity? Who knows. How many Pro League players are currently pursuing a tertiary education in TnT? Are there other things besides individual desire (or lack thereof) that's preventing them from doing so?
5. Mexico? Dred... you can't begin to compare the opportunities provided by the Mexican league to the Pro-League. Pro League can't help you feed and provide for your family for life. Mexico has sponsorhip, attendance, merchandizing, TV rights etc. All these varying sources of funds helps supply salaries for Mexican professionals comparable to what might be available in Europe. The Mexican league itself is a destination, not a stepping stone... so yes, if offered a contract then it would make sense to accept that, the money alone might be worth it... say nothing of the exposure.
I understand your larger point that the league didn't get there overnight, it took talented players to develop. But the Pro League ent have that kinda talent, don't pay that kinda money and not getting as much attention from European scouts to even merit being mentioned in the same discussion as the Mexican league. Pro League not even on MLS level... USL might be a better comparison.