As you said in your post.... loads of features increase attack vectors for more exploits and that is not what we want. Now you have a feature rich wallet with a lot of holes and weak security.
I would agree with you if Electrum had a history of people taking advantage of various bugs and vulnerabilities that weren't fixed and tested thoroughly before they got rolled out as new features. But I don't remember such incidents that caused serious problems. Maybe someone can refresh my mind?
Just because there weren't any in the past, doesn't mean there won't be any in the future. It's better to be safe than sorry. However, this is still a suggestion to fix something that isn't broken in the first place.