So you're saying that every time I want to remove a private key from my wallet, it's better that I should dump all of my private keys, then create a new wallet with all the keys except the one that I wanted to remove? Instead of just clicking a button or typing a command to remove the key?
That's absolutely ridiculous.
No, I'm saying that if you have a button that does A and a button that does B then having a button that does "A then B" isn't "incredibly useful". It's merely convenient.