I don't think you understand.
Umpires are willing to give up some control of their calls to help the game. I'm sure they're okay with each team challenging a play throughout the duration of the game. If a team missed a challenge, then sorry, they obviously can't challenge the next call.
I'm sure they're okay with the challenge system for balls and strikes. 3 challenges of 125+ pitches for each team, I'm sure the umpires are on board with that. But if a team carelessly uses all of their challenges, then sorry, we're back to playing normal baseball. They're not willing to go to the robotic system, and I'm not even sure players are 100% wanting to go to that as well.
News flash: we can still play baseball without the pitch coms and the pitch clock, they did that in Washington earlier this season.
They've been talking about this for 5+ years, and it still hasn't happen.... So I'll believe it when I see it.