I don't do any of those three risky things you mentioned, but that doesn't make CPU bugs irrelevant. I believe in defence in depth. #ZeroDay bugs are a fact of life, and, thanks to LLMs, we're seeing more now than ever before. I'd prefer to give the bad guys as little to work with as possible.
I don't need persuading about the merits of #AMD: my main machine runs a twelve-core #Threadripper. 😄 When I bought the machine, AMD offered better bang for the buck than #Intel, and, yes, it does seem to have fewer vulnerabilities.