I think wallets should first warn you if you are using or genrating low entropy keys or seed phrase, to many people lose coins like that all the time.
In fact there are some hardware wallets that warn you about that, but I didn't saw similar examples with software wallets.

As for quantum computers, if they ever became a thing than Bitcoin would need to have major code upgrade quickly.
Last thing people are going to think was address reuse, but I agree that should not be done in general.
Warning is not a bad idea, or we could just use more Silent Payments, that way address reuse would not be possible.