You are 100% correct when you say that most people dont need or benefit from the difficulty of a multi-signature wallet. Why do that when there are easier choices like Electrum?
Multisig (Multi signature) wallet is a new type of Bitcoin wallet to secure your wallet and your bitcoin better. It's an advance development from Single Signature wallet for Bitcoin.
But you misunderstood that Bitcoin MultiSig wallets can be set up by many Bitcoin wallet softwares. Electrum is one of Bitcoin wallet softwares can be used to set up a multisig wallet.
Bitcoin multisig wallet is not Electrum wallet and your post is like with Electrum wallet software, you can not set up a multisig wallet. In fact, you can do it with Electrum.
Multisig wallet (Electrum documentation).
Creating a multisig wallet with Electrum.