My attitude on all this has changed over the years. I used to get on PSA for every mistake they made.
Would I love it if they were perfect? Of course. But the reality is, they have no expertise on classifying wackys precisely, and never will. So I take them for what they are, which is a means of detecting alteration, separating high grade cards from junk, making selling high grade cards more liquid and enhancing their value.
For all their flaws, they make it possible for me to actually buy wackys I will be happy with on eBay, and no other service has ever accomplished that.