“He was a good pitcher, but 254 wins shouldn’t get him in, AFAIC.”
I am not disputing your rationale but as of today there are 21 pitchers with less wins then Morris in the HOF.
Morris should be in based on Game 7 of the 1991 World Series alone.
:-) Great minds, and all that.
IMHO, unless the pitcher is a reliever (so they won't get wins), or there is an unusual circumstance (say, someone like Sandy Koufax, whose career was cut short by injury) then the 21 players you mention don't belong in the HoF, either.
Bottom line, there should be fewer players in the HoF, not more.