The average rent in the US is about 1600/mo, and the median household income is 83k/yr. Obviously these averages/medians will change dramatically when looking at individual places, but if you live in a major coastal city that’s infamous for being unaffordable you will absolutely need roommates to afford rent. However there’s also plenty of major cities which are not unaffordable so while you can have your eyes pop out of your sockets looking at LA, SF, NYC, etc. Toledo OH or Milwaukee WI are just quietly going on about their day being relatively affordable places to live with plenty healthy local economies