I see your point but I think you are kind of both right. Reading between the lines a bit but I think the side effect of his cancer is an inability to gain/retain weight, and his inability to gain/retain weight would make it hard to compete at this level. I think he has the tools to be a good player but he's going to have to put on weight, which I imagine is difficult given what his body has gone through.
I don't necessarily think it's "trolling him because of his cancer" to point out it's going to be hard for him to play at this level at his current weight, even if that weight issue is a byproduct of his cancer, It is, however, very unfortunate and I hope they can take this year to get it all sorted out.
Sure it was a troll by @CyTwins, but to his credit he backed off of it.