Warren Buffet's goals are not the same as those of someone who wants to maximize long term returns while also minimizing time and effort spent evaluating investment options.

Valuation absolutely matters, and buying when something is overvalued can irrevocably screw you over.

And that is on a broad market basis - individual companies can just flat out go bankrupt and cease to exist.

If you bought in ‘72 or ‘99 for instance, it was a very, very long time before you’d even be able to cash out neutral.

Agreed, but I would consider those different companies (particularly in '72). When dealing with a small or medium company, the approach is very different and I would very much agree regarding risk of overpriced. However at this point Apple is very blue chip and very different than their startup or almost bankrupt earlier versions of themselves. If Apple were a startup or side-company in the tech industry, I'd have a very different opinion regarding whether they are over-priced or not, and how much risk that would carry.

Which hey, maybe. But that is exceptionally rare in practice.

If it makes you feel better to assume anyone with a different opinion than you must be an unreasonable and uninformed idiot, then by all means go ahead thinking that, but I have little interest in engaging in a bad faith conversation.