What was the point? Well let's go over the reasons given for losing or not losing:
1. Won so Garrett can have two winning records is a row? First of all, if anyone can read his mind, they need to go to Las Vegas and do a show on the strip, I'm sure the ability to read minds would make a big impression on people. And really, a guy who is an ex-NFL player, and a head coach of one of only 32 NFL teams, who doesn't have to worry about his job is going to feel oh so much better because he went 9-7 instead of 8-8? And wouldn't make the playoffs if he won? Who's going to say 20 years from now "wow, he had a winning record two years in a row back in 2016 and 2017, good thing it wasn't 8-8 the second year, that would mean he's a bad coach". Nobody knows if that's why they tried to win the game.
2. You would get 4 more spots up the draft list. Oh, so you mean we'd have a chance to get Fitzpatrick, Chubb, Ridley, Vea or Nelson? Not likely. If you subscribe to the "there's only 14 top draft picks", at 15 you're still missing out on those.
3. It's about the future. Who knows what the future holds? Cowboys wanted Francis in the 1990 draft, couldn't get him, so they had to "settle" for Emmitt Smith. How'd that work out? And Dak had a not-very-good year in 2017, he was in only his second year, think he doesn't need the work? How about Woods, Awuzie, Brown, Switzer et al? NFL game experience isn't a good thing? Even against second teamers, it's still against NFL players, whom even the second stringers are better than 95% of college players. Games aren't like practices, you can't duplicate game experience.
Now I'm not saying they didn't try to win to help Garrett, to have the players feel better because they had a "winning" record. That's entirely possible, but there are reasons not to tank the game, as well...