I mean, sure... as fans (particularly jaded ones with the occasional axe to grind) that may be the only reason that makes sense. Who knows really.
Pointing out that there isn't much hockey-related that kept him up on the team or that getting practice and in-game reps at the minor league level, which is a proven method of improving someone's game is... "having an axe to grind"?
Tage and Nylander earned spots coming out of camp/preseason IMO. Moreso than Smith, Olofsson, O'Regan, Asplund, etc. Given Nylanders benching in the AHL playoffs the prior year and the fact everyone seemed to point to attitude/effort as the reason, one good camp may not have been enough to convince the organization on him. So Thompson got the spot.
The point that he
kept the spot even though he was not good at what he was doing in the lineup was the issue of the post. Hearing Botterill lament that he would have liked to have seen players like O'Regan or Smith in bigger roles in Buffalo was particularly frustrating since both went on solid runs in Rochester that are easy to reference as a merit recall for such a look. The opportunity to make internal roster moves and take a moment for evaluation was again lost. That's a bad look, especially when the guy who can make those decisions comments on it like he had no power in the situation.
As such, I have a feeling Thompson is a confident kid. Takes his struggles and losses on the chin, with a good attitude and does (or tries to do) what his coaches tell him. Not to mention he's a talented hockey player that really needs to work on his decision making at the NHL level. I'm sure they saw that in him, didn't see his struggles this season as detrimental as the extended look in the NHL was beneficial.
Given the team's comments about doing thing "the right way" and internal competition, looks odd in light of the free pass his terrible play was given. If they'd sent him down when he was sitting out games and he went on even a fraction of the pace he did to end the season with the Amerks, the overwhelming demand from the fans would be to have him back up and in the lineup. They didn't send him down and left him to building frustration which was evident in his play. That certainly doesn't seem like the best environment to develop a key prospect.
Keeping him in the NHL all year may not have been the best decision, but I don't see how it's a horrible one. If sending him down would've been moreso to boost his confidence, I'm not sure that was needed. Tage is doing fine for being a project.
That's the closest I've ever seen you come to criticizing the current front office.
That Tage went down and did the right things, said the right things, and more importantly played the right was is a credit to him. That it may have been possible to send him down, get him a confidence boost and time to work out some of his issues and then return him to the lineup late is the point. They did not handle him in the way everyone else was handled (except perhaps Mittelstadt, whose terrible play also meritted a move to the farm to work on his play too).
I think people want it to be a crippling decision for the sake of being "the icing on the cake" for this trade very badly for odd personal reasons. It doesn't all have to go back to the trade... but I get why fans here think it should/want it to.
Which crippling decision are you talking about? Most fans want to salvage what they can from the trade, for them to make the efforts to turn out the best results for Tage and the picks. There is no need to justify the terrible nature of the trade with any icing on the proverbial cake, it was the most lopsided trades this team has made since Dom left.
Seeing Tage round off the edges, to start making better decisions with the puck, learn when and where he should dangle, learn to get inside more, learn how to engage defensively. The part about the trade is trying to find whatever thin logic was being used to maintain his position in the lineup and on the NHL roster, not about seeing him fail as punctuation to Botterill's summer folly. The optics are not good.