If you don't want to pay for baseball, they don't care if you like it or not.
If you don't want to pay for iPhone, Apple doesn't care if you like it or not.
If you don't want to pay for electricity, your energy provider doesn't care if you like it or not.
Blackouts is a concept driven by a desire to sell seats in the stadium. It is somewhat antiquated now that TV deals yield far more revenue than ticket sales. Nevertheless, blackouts probably still work in terms of driving passionate fans to buy tickets and go see games in person. If they didn't work (meaning make more money), the leagues would probably do away with them... as non-blacked out games can still make money on advertising sales... and more money on more eyeballs watching the game.
Go to one professional sports game in America and get decent seats and you probably spend more than any of the streaming "whole season" packages. So that is MORE revenue from you than they can get by encouraging you to NOT attend a game by removing blackouts.
All such decisions are carefully calculated ones about how to maximize revenue for their "product." If some decisions turn some people away from watching in any form, that's OK, as long as the revenue maximization is believed to be optimized.