This is inefficient and poorly considered. When my family got their first modern computer in my teens it ran windows. When we bought a better one so I could explore computer animation it ran windows. My first computer I paid for dual booted linux/windows. My computers now exclusively run linux.
I switched to free software because it was better ideologically but more importantly because I can presently use it to accomplish my goals.
Dual booting is surely inferior to just running free software from a software freedom standpoint but if I couldn't dual boot I might not have bothered at all.
Making nonfree sofware require an affirmative act beyond apt-install foo is a good step deleting all info from the official platform is unreasonable.