This statement is (1) unnecessary and (2) wrong.
There are a lot of ways to lose money (BTC) while still having your seed.
Especially since OP mentioned he is using v2.7.9 of electrum (which does have a vulnerability).
If an attacker is able to get access to your seed (which is possible under some circumstances with the old vulnerability) he can easily transfer all the BTC's out.
You will be left with a seed containing 0 balance.
Safe and secure do not mean the same!
Keeping a backup of your seed = safe.
Being protected against an attack = secure.
I was talking about "Wallet not connected" issues.
Remember the context.