At the moment we're importing the general css file. when things addressed nicely then that can be done but you can get a very big file and maybe its better to include a seperate file for it or give an option for it. This way you're maybe defining classes more then once but you do know that the files in that file are all used in that view.
Ah well in my case (custom test-version of JEM running in Joomla 4) i did strip the import of jem.css and am using a dedicated file for it.