I agree with you and I've given this a lot of thought over the last year or so. I think the problem is that the need for shared/rental office space isn't in the big cities where WeWork has its locations, it's closer to the suburbs where the people that WFH live. The folks that WFH who either don't have adequate space in their home or prefer to go to an office to work would consider a rental office space but don't want to have to commute into a major metro area to work. The office space would need to be closer to where these people live and offer a shorter commute than going into your company's office.

In my area I see a lot of vacant commercial space in areas like strip malls or "main streets" that would make great co-working spaces. These are likely cheaper to lease and are closer to where people live making the commute manageable. As an added bonus it could have a positive effect on the local economy (coffee shops, lunch spots, etc.).