You are missing the point and comparing apples with flamethrowers.

The point of a hardware wallet is not to hold keys offline. It's to sign transactions while holding keys offline.

Obviously, if you don't want to sign transactions, the HW has no advantage over a piece of titanium with the seedphrase on it.

But the piece of titanium can't sign transactions. This is why people buy HW, because they want to sign transactions while keeping their keys offline.

You don't sign transactions very frequently from your cold storage, do you?