Yes. Code doing what you need && nothing else is better than code doing what you need && 10 other things you don't need but have to take a perf/memory/clutter hit for.

Yes.

If you want to do foo. You don't need framework bar to load baz or call home to qux.

That's all added complexity that isn't inherent to the task.

So we aren't talking about not doing bar. We are talking about not doing all the other things that aren't for the benefit of the user.