I don't think it's even possible to for anyone to stop someone from using a VPN. Sure, in theory, they could affect VPN providers' businesses, but you're always going to be able to connect to a VPN if you want to. They'd have to block or heavily limit internet access in order to stop users from connecting to some remote server.

Also yes, I do think lawmakers are aware that vpn's are not a threat to anything, thus there is absolutely no reason to ban them.

Edit: Someone else mentioned a good point. Even if we consider them blocking vpn as a possibility "The uproar would be enough to kill the bill before it gets out of committee."