And I will say as a guy that has been dinged by it, that people do still think of the whole career even if a season was great. I used Magic as an example, he had that season late in his career where he was bombing 3's and hitting at a high rate, but I think most people would consider that season a fluke rather than a trend. So just be wary of taking an abnormal season. You can be convincing as to why it wasn't a fluke or that would replicate on your team, but you may not convince everyone.
The best usage is for guys that get hurt after that season and are never the same. Walton is a pretty classic example of that (from ineligible players). You will generally get the benefit of that player being healthy if he was healthy that season. Zion has never been healthy, you won't get the benefit on him.
Also, if you do take an older player you will have to do some convincing on the outside shot. Take Karl Malone, I think if he was a modern player he'd have been an excellent 3 point shooter, but not everyone may feel that way. So that can be tricky. The more traditional centers under modern rules may not be convincing either. Sure if you are talking about a guy like Shaq, no one would question whether he could succeed, but there are very few Shaq's.
But this is what makes this both so fun and frustrating at the same time. Everyone sees things differently. The exercise itself is a blast though and you do really learn a lot about the history of the sport doing these things.