You’re right, Perot was by far the best third party challenger ever - and I think it was actually 19% - but that was still not even close to winning.
Pop pop got 37% just for being a Republican. Clinton got 43% just for being a Democrat.
There are tons of voters who just blindly vote along party lines.
I certainly agree with party line voters. I was just answering the question, and then stating my dislike of HW, and far better thoughts about Perot.