Which is fine, until you get that mechanical problem you can't fix, or if you want to ride someplace, do errands, and ride home.

Some of us need walkable bike shoes, others don't. Get what's right for the way you ride.

As to the question, I'm sure you can ride with just the bike shoes and platform pedals, whether they will be practical or not, I can't say. But there's one way to find out--stop typing and try them out.