I mean, the
impact of that usually fairly public anyway, especially if it involves subsidies or legislative changes. Companies are free to whinge about legislators they consider obstructive too; Elon loves it!
I'll put it another way. Florida is quite happy to send state officials very publicly to small events explicitly focused in reeling in businesses, do a very public presentation about how they don't do socialist things like handouts but do offer them material support in building out their US base in Florida, and then hang around for networking. It's very much part of their jobs, and it's advertised and reported on, and in at least some cases open to the general public. So if I'd wanted to sidle up to Jared Purdue and explain why Florida's state investment fund should underwrite part of the cost of a space propulsion facility near Cape Canaveral, I was at a small event nowhere near Florida where I totally could have done that recently. But if I have no expectations that commercially sensitive data will be protected I'm almost certainly not going to consider following up by sharing financial projections and plans and evidence for his staff to review (and yet would be free to proceed if he can make things happen based purely on 5 minutes conversations or suitcases stuffed with cash) . I suspect Florida voters would prefer their DOT to be able to have that proper follow-up though (or would if the plant was likely to happen in the next 2 years and likely to end up in Florida...)
If the public wants more insight into what governments are doing to attract business you get that from budget transparency, formal review processes, publicised state support thresholds, independent anti corruption monitoring etc and of course PR about success stories, not by placing all written correspondence with businesses into the public domain, a measure which will severely limit their ability to [selectively] attract business. First thing I'd want the government to do to attract business is to respect the same confidences everyone else does, and that means where the new plant might be is non public information.
Likewise Elon can threaten or offer campaign contributions to a governor over the phone and probably does so, but if he wants to actually do the responsible thing and email lots and lots of arguments and evidence to try to persuade a governor that vetoing a bill is a bad thing, it's probably reasonable to assume that some of that is commercially sensitive (ironically if it's financial or technical details redacted from long emails is actually material to changing the governor's mind, it's probably because the case is better than the generic "yay Gigafactory, yay looser autonomous test regimes" arguments that get trotted out). Better to have a paper trail only suitably cleared people can see than nobody prepared to leave any paper trail at all.
And yeah, it's Elon, so there's probably other stuff that has nothing to do with his companies redacted too, but that's another issue entirely