It's just not that simple, as private individuals do contract work and manage private businesses, large residential and commercial complexes use VPNs to manage high network traffic and guarantee security, and off-site IT support regularly use VPNs for elevated access.

Retail VPNs don't even strictly evade ISPs. They simply route traffic through their own hubs and then on to the destination. If the UK were to "ban VPNs" that wouldn't really stop me from connecting to a US or French based VPN service. And that's what I'd want anyway, since my goal is to not appear to be a UK resident while trafficking data.