Yeah, that's the problem with so many of these in-game attempts at change--baseball has, by design, a check on nearly every action, and if you just eliminate/ drastically change one to "speed things up," it has a ripple effect. And while, in the moment, throws to first may feel annoying to some, there is no way that's some meaningful slowing agent for a baseball game anyway.
It's a really bad idea. In his defense, most of the ideas put forward on the subject outside of "make the commercial time shorter" and "get rid of the instant replay" are really pretty clearly bad/ won't do anything.