How to avoid removing essential packages and be able to run i386 programs? Ubuntu 20.04.3
Solution 1:
T Br https://askubuntu.com/users/1383491/t-br had a great lead to the answer - Struggling to install i386 packages on Ubuntu 19.04
I had previously changed my 'Software&updates' settings 'Updates' tab setting "For other packages, subscribe to = Security updates only"; after setting this to "All updates" the situation is fixed and installation works without any trouble!
Installer warning messages were confusing me, I did not think that the setting could lead to such situation.