Right on. A “computer I own” seems to presuppose that this computer does all these millions of things, many of which (I fear) can’t be provided practically for less than a compromise in ownership.
You can build (and own) the Apple I but you can’t reasonably write a Chrome-compatible browser for it, if Google aren’t interested.
Thus I find asking for a “computer you own, like any other tool” is a bit nonchalant wrt. the scope of the request.