Ask Boston would they rather play the Yankees with Severino pitching once or playing Cleveland best of 5.
They would likely say Cleveland as Boston and New York taylor rosters specifically to beat the other. Cleveland can beat anybody they are that good but they aren’t as good as Boston/New York.
The wild card play-in game makes some sense but if it’s the team with 2nd best record overall in baseball it hurts baseball to have that matchup in the best of 5.
The NBA has changed playoff seeding rules to prevent this stuff.