It's definitely optimistic, but a 2 week timeline for a minor MCL injury is within the realm of plausibility. I agree the odds of him being back that early probably aren't great, but based on everything we've heard yesterday and today it can't be ruled out.
Also, just kinda in general I'm not a big fan of the "even if he's cleared, he should be held out as a purely precautionary measure" way of thinking that gets floated pretty often around here. Well, maybe for someone like Gronk, where it's become clear that 16 game seasons just aren't in the cards for him and he requires careful management to get him through to January. But for basically anyone else, if he's cleared to play for the Green Bay game, then he should play. If he's not, then he shouldn't and won't.