Did you care about this when it came to your other computing needs? What PC/laptop are ypu running and how efficient is that?

Yes I do. I've got a spare desktop that isn't too efficient (probably ~100W idle but annoyingly I've lost my power meter) so I don't leave it on even though I would like to use it as a server.

Laptops use very minimal power - you don't need to worry about them. If they didn't their battery life would suck.

Likely orders of magnitude different, this is a weak whataboutism.