The real question is not whether a VPN solves privacy in one move. It is what stays stable long enough to be tracked.
Stable identifiers make profiling easier. That could mean IP addresses, repeated behavior, or long-lived sessions.
What a good privacy design does
A stronger privacy design reduces unnecessary stability. That is where features like IP rotation and relay layers become practical tools instead of marketing buzzwords.
The goal is not perfection. The goal is to reduce easy correlation and avoid giving observers a clean, stable picture over time.