Your ISP is a near-monopoly with vast wealth and political connections, and no trust to lose. A VPN is used by a much smaller group of people who will ditch the

Your ISP is a near-monopoly with vast wealth and political connections, and no trust to lose. A VPN is used by a much smaller group of people who will ditch them en masse if any hanky panky comes to light. There is a ton of competition in the VPN space, and they’re mostly selling the same product, so if they lose trust, they’re done. TL;DR Very different incentives