I totally understand what you’re saying, but at what point does it become “putting money under your mattress” versus using a bank?

Yes a major outage that’s no fault of my own could take down my site - and that isn’t great. On the other hand, wouldn’t you trust them more than yourself? Just like you trust a bank more than yourself to keep your money safe? I’m sure the average major cloud service has far better uptime than the average on prem solution. At what point does it become hubris to spin up your own on prem solution?