I wouldn't say "should be", but HBM could indeed benefit the end-user somewhat, like @15155 already pointed out. And that benefit could be used as justification for soldered HBMs on future computers.

BUT... a smart consumer would also recognize the other side of the story: do we really need HBM on consumer devices? We don't serve 1000 users at the same time, a slower, cheaper device is good enough for most use cases (including the professional ones), better if it's also somewhat future-proof. After all, smart people usually have better foresight.