Yeah, mountaineering tents are waaaay overkill.

I've spent at least 20 weeks camping in mountains of Washington State over a period of years, almost all in the summer.

Mostly, the weather has been stellar. Calm and clear.

In alpine swampy areas, the bugs have often been rather bad, and I've been too timid to use an unnetted tarp shelter, opting mostly instead for a miserably small bivvy tent. I keep swearing next time I'll leave it home in favor of a tarp.

As I remember, have only spent three winter nights in Washington mountains. Checking the weather forecast would enable avoidance of monster dumps, and therefore any need for some kind of canvass citadel, assuming garden-variety trips.

Interior ranges of B.C., are a somewhat different story, but I'd never want mountaineering tent there in summer. They're for really, really bad weather, really expensive and heavy.