Maybe it just seems that way to you because you do not think they have a reason to become indigent.
No, I think "seem" as a qualifier places it perfectly well into the realm of an opinion, with the implied agreement that it can be debated.
You and the other comment mistake it for an absolute judgment, which would be problematic, but that's not what the OP was writing.
Impugning peoples' motives like that should require some justification, even if it's labelled as "just an opinion".
If you are going to vocalize an opinion, you should expect to have it questioned. Just saying "well that is my opinion" does not put it off limits. Far from it..
It can be questioned as a stated opinion, yes. But not questioned as a stated fact, which is what happened.