I'm not really that surprised that people around the league think others wouldn't have been penalized for the hit and that only Tom Wilson would get this treatment. If Matt Cooke were in the league and made the same hit, I think he'd also get a hefty punishment, for instance
The fact is Tom Wilson has a unique suspension record, so he is going to get unique scrutiny. Is there anyone in the league right now who has as many suspensions due to illegal hits, and games missed due to suspension due to illegal hits? I don't think the punishment is for him being Tom Wilson and Tom Wilson alone, it's because he keeps making dirty hits. Indeed, Wilson skirted the line several times before he received his first suspension, and the NHL even put out a video for why they did not suspend him when he hit Brayden Schenn:
He did receive the benefit of the doubt early in his career. But then he kept making borderline to illegal hits, until the league said enough. And now, he doesn't receive the benefit of the doubt. As I mentioned, I think there was some doubt in whether Brandon Carlo was defenseless.
This is not to say that I think it's right that others would not have been penalized for the hit. I think too many players get away with too many bad hits. That doesn't mean that Tom Wilson should get away with bad hits though.