Even if that's the case, why not just cut the mic and have security escort him away? Why jump straight to sending the cops to arrest and jail him?

It's abundantly clear that these things happen not because people were so disruptive that it was necessary. It is that they are saying things the government doesn't like, so they use the only tool they have as strictly as they are allowed to in an attempt to discourage people from speaking out in the first place.

At least this is triggering the Streisand Effect, and now this farmer is getting interviews on the news, not only about the Datacenter, but how the local government treats those who speak out against it.

In the video - 1h58m mark roughly - https://m.youtube.com/watch?v=xLPF3rTT0mY

It shows the full context. Yes, he went over his time, he talked over requests to stop, and then approached the front area. He was asked to leave the area, did not, and so the behavior was halted in favor of pre-established rules.

Yes, I’m in favor of free speech, and think more time should be allotted, but does his direct use of extra time impact those who will then not get to speak?

It’s the lines in the sand that are the hardest to draw.