Having read the whole blog post series I agree.
I can't figure out what the issue actually is meant to be here: the strongest argument is that the emissions SpaceX will have from the Starbase site itself will be higher then are being reported because the assumptions about the facility they're building are not accurate.
This might be significant, although it's certainly an argument I have a hard time worrying about in Texas, for this one facility, unless it would actually have a deleterious local impact (or be unmitigateable) - but it is a reasonable point of concern and a good use of public comment - though as noted in the series, the NEPA process is more about documentation then prevention. SpaceX can it seems, just update the numbers now and say "yeah so anyway it'll be that".
Where I'm much less clear is the argument about the gas wells or the gas pipeline - which are presented separately but seem to be necessarily together in order to link them as an issue associated with the Starbase site's operations itself, and I'm really not able to connect the dots here: it's implicitly obvious that Starbase is going to use some quantity of hydrocarbons to operate, but I'm not clear - once the site itself is accounted for - why its a problem that the pipeline and wells they'll necessarily build not being initially included matter?
Is the NEPA process somehow going to grant approval to construct fracking wells that will not be on the Starbase site, or approval for the pipeline construction? The pipeline argument in particular seems to be the weakest because if the existing decommissioned pipeline (who's run length I imagine SpaceX intend to use) was denied, based on the map coloring as presented in the post there's very obviously another path which doesn't cross any shaded regions...through which another pipeline already runs. If it does that seems like a problem, but I'm having a tough time figuring out how the FAA approving rocket launches would in any jurisidiction translate automatically into "and so we also are totally approved for this subsidiary company's fracked natural gas well many miles away and a pipeline".
There seems to be a weird implicit assumption that the FAA approving what it has would somehow approve it with every other agency - which, can it? Does it? As things stand "we're going to build a 250MW gas power plant" maybe shouldn't happen on the site seems to be my takeaway, but since they haven't built it yet and since it's existence doesn't seem to of major impact beyond land-clearing and emissions, surely whether it could be built is one question compared to whether SpaceX can get approval to do everything else they'd need to run it? At the moment they've launched zero rockets, but it seems like they'll be able to launch some without any of this and everything else is a question for the future - and surely the point of other regulatory processes particularly if it's not happening on the site itself?