It has been mentioneoud before, but it’s not just foreigners, but everyone on this island relies on convenient stores. You should start a list of things you can’t do in a convenient store. That would get some hits.
If you ask anyone who’s ever lived here about what’s so great about Taiwan, I almost guarantee you convenient stores ends up on their list.
Nonetheless, you do bring up a good point. You don’t need to speak much of the language and can survive on convenient store food for awhile. However, anyone and everyone knows that there’s better food out there!