The problem is that Stanley can cause a lot of problems in 12 minutes of play. An unnecessary penalty. Missing a D assignment. Those things cost goals, and ultimately cost games on occasion. Conversely, what does his penchant for fighting actually contribute? I know teammates and some fans like it, but ultimately it's about winning the game. The Jets aren't good enough to have to make up for Stanley's deficits.
This is what I don't get. They are the best team in the league. Stanley has played in 21 of 33 games. Jets are 15-5-1 with him in the lineup. You can say that is because of all the other players, Helly, Morrissey, Scheifele, etc, and it's true. But if Stanley had such an overwhelming defecit, the Jets wouldn't be so good with him in the lineup.
One way to negate some of his defecits is by having Adam Lowry out there with him, who is a positive impact player. Negates defensive zone breakdowns.
I think the jacket he got against Boston was an example of how his teammates feel about him, and that's big, knowing you have somebody out there who has your back, and if you take him off the ice it isn't going to affect the performance of the team in any significant way.
I honestly think the dressing room likes the guy, which is what a team is made of. While you can make a team succesful out of converging personalities like Wheeler/Laine, Buff/Trouba, this team is different. I think from the outside they are still largely seen as fragile, soft, in the post Buff era. Probably softer post Dillon.
I am probably, like you, hoping for Stan not to be a starter in the playoffs, but for now at the least, any defecits he has seem to be mitigated by other players contributing.