If it's Aaron Rodgers or Mahomes or Brady under center, 99% of coaches try for the 1st down.
Sure, you can say Jimmy G isn't any of those guys. But for the last 30 minutes, he had been. Some guys just "have it" certain times, and Jimmy had it the whole 2nd half. You go for the win.
McVay went for the "not lose". Just like how he capitulated at the end of regulation and didn't even try to get into FG range to win it in regulation. Sure, the odds of them getting the 35 yards on a toss were less than 50%, but whatever number less than 50 that was, it was more than the 0% chance he got by just letting the clock run with a timeout in his pocket and hope for a good coin toss. Long slant route towards the sidelines with 2 receivers that can absolutely outrun their defenders has a way better chance of success than walking off the field.
Like, everybody's just ignoring this end of regulation sequence when it was the most egregious of the day.