Who's talking themselves into anything? This isn't Blue Jays fans talking themselves into a narrative; it's literally being collaborated by outside baseball writers who are cycling reports/information from other teams' evaluator's as well as in-person evaluations. These people have absolutely no reason to "cover" for the Blue Jays. Both players we traded have empirically been moved down prospect lists; with Martin dropping all the way to #59 on Fangraphs' rankings.
Of course Blue Jays fans were initially "shocked" and mad, but that's because as fans we generally Stan for our prospects and look at things in the most optimal light possible. I don't think anyone here is arguing that Austin Martin has no chance of correcting his flaws, but the general stance that we'll naturally take as fans is to gloss them over while they're here. To me the scary part with him is that the two things that literally popped up as critiques pre-draft, which is what caused him to drop to us, actually look to not only be legitimate - but they appear even worse than initially hoped. Fangraphs says that he's not even getting good reviews defensively in CF with a below-average arm and average range due to his lack of speed, and he's obviously not a SS or 3B. So what is he now, a 2B and/or rotational piece between CF/2B/LF? At the plate he appears to require a swing change. This isn't an impossibility and he's obviously talented enough to make it work, but a current slap hitter with no defensive position where he projects as more than average is a profile that can go downhill really really quickly. I also found it very interesting that Fangraphs noted that evaluators were pointing out that he wasn't swinging at enough pitches and that he was playing himself into too many poor hitters counts.
With Simeon Woods-Richardson, I've always felt that he was a guy who we tried to hype into more than he was. He was a mid-rotation upside when we traded for him with non-elite stuff, and he's since then declined. His age is nice, but he's physically maxed out and he apparently still can't spin a breaking ball that projects as more than average to fring above-average. The lack of control he's shown this season is confusing and worrying, because this was actually his only true standout "tool", as are reports that his velocity and stuff in general have backed up.
So really, they traded two guys from an elite farm system that have bigger question marks today than they did coming into the season. Of course there was an initial "shock" of trading a guy we just drafted 5th overall and outrage surrounding that, but the reason why you've seen a change in attitude is because we've had time for information to come in which suggests that this really isn't a "shocking" a package as we initially thought.