There is a certain group of baseball fans that love the traditional aspect of the game. It's America's pastime, it has a human element and it needs to be left alone. There are too many replays, the advanced metrics are clouding the game and the rules were made for a reason and are not to be challenged.
Especially the unwritten rule of baseball fans that says you have to watch the game until the very last out, even if that last out comes at 1 a.m. in the 21st inning.
The purists aren't wrong about the first two things.