Right, but then (1) your VPN will have a browsing profile which aggregates your otherwise ephemeral, anonymized and un-correlated browsing sessions; and (2) it

Right, but then (1) your VPN will have a browsing profile which aggregates your otherwise ephemeral, anonymized and un-correlated browsing sessions; and (2) it would be easy for adversaries to extract that very helpful profile. If your threat model does not include (2), (1) is still bad!