Yeah, that's a perfectly reasonable theory right there!
I have an @gmail.com account with about 20 years of stuff associated with it, from purchases to YouTube subscriptions, from calendars to GCP accounts.
However, I use a vanity email (me@somedomain.example) that everyone I know uses to get hold of me. Until about 10 years ago I could just forward emails but that slowly became unworkable as more and more stuff just broke due to SPF etc. So, I've been using POP pickup (and accepting the 5-30 minute delay) ever since.
As I understand it, I can't move all my gmail.com data into a GWork profile easily, and POP has worked for years. This is very frustrating.
Many people are fiercly attached to the Gmail interface, but refuse to pay for Google Workspace, or even manage multiple email accounts in a desktop client.