That's not what I said. They did offer it, then removed it after I had made the decision to use them partly based on the Open Source self-hosting nature of the project. They used Open Source to bait and switch me.
I don't even need helm support, I'm fine to do my own. But they stopped even providing versioned releases so there's no stable tag or branch to build and target. That's actively hostile to anybody not spending their full day managing Posthog stuff.
I had planned on switching to the cloud Posthog when we got big enough, but it seems like we will have to start out with other options and it'll be much harder to change that later.