Huh? That was only mentioned to point out that the classic "renewables are so risky" line hasn't borne out for Texas. Fossil fuel plants have repeatedly been an issue as well. But it was just an aside, more importantly was it saying those generation facilities all being online wouldn't actually make much difference. That power generation will sometimes need maintenance or have failures or under production at awkward times is just the nature of the beast, certain safety regulation might help but everyone on HN should have some sense that chasing 9s gets very expensive very fast. What's really needed is to just have enough overall capacity (both steady and peaker) ready that a reasonable amount of failure is always ok. In a large energy grid a few generators dropping should never register as an immediate possible emergency. Texas needs more generation/storage approved faster.
And other states are tied into vastly more massive grids, they aren't islands, and they haven't had the same obvious increasing demand due to demographic/business shifts that Texas has been very actively encouraging. Their connections lets them help cover each other, which is a perfectly valid strategy, and they will have a more gradual increase. That other states are slightly worse than Texas isn't presented as an OK thing, but rather something they should be working on too. But they have less immediate need. That's just how it is.
I'm not sure how you came to your conclusion there. I don't know if he's right, I'm not from there, but his message is self-consistent.