Likely some selection bias there, in that your company was not fully remote when people took their jobs. People tend to take a job that is suited for them: if they want to work in an office, they take an office job, if they want to work remotely, they'll take a remote job. Remote-only or remote-primary companies exist (see: WordPress, GitHub, Gitlab, ElasticSearch, Ethereum, MakerDao); many of the people who actually want to work remotely already work for one.

I do suspect your numbers are probably pretty close to right, though, given the number of jobs at such remote-only companies vs. those at traditional Silicon Valley offices.