You've been able to book a taxi on your phone for decades - with your voice. Just like if WeWork had existed 60 years ago, you would've been able to book a space in your newest nomadic locale with a phone call.
The value prop of Uber was that you could be instantly and automatically matched with a nearby taxi (minimizing cost and time) and see those costs / timings in advance. That required[1] the internet and software, i.e. "tech".
[1] Ok, so hypothetically, you could've implemented Uber 60 years ago if the taxi company called every single one of their cabbies every time they got a phone booking, figured out which one was closest, sent them to your location, and then called you back to tell you "your cab will be there in 5 minutes". But tech made it VASTLY more efficient. Tech makes WeWork only marginally more efficient. Hence, not really a tech company.
In fact, I think "efficiency gains from developing tech" is probably the best way to determine if something is a tech company or not. SpaceX is a tech company because they're using advances in technology over the past 60 years, combined with their own advances in technology, in order to deliver a product (re-usable rockets) that is far more efficient than what we had before (and brings down cost appropriately).