I'm not sure this is the case. What are most people using these services for? Are they using them to commute to work? That seems unlikely.
Are they using them to meet friends, go to the bar, go to meetings? That seems more probable.
In the case of meetings, they would likely still have to go. That's work, after all, though some meetings may get cancelled, or be done over the phone/video chat.
In the case of meeting friends and going to the bar/dinner, the situation is probably the same.
In either case, I bet there is a significant portion of people who would decide not to do something if Uber/Lyft didn't make it easy to get to. The comments around this story seem to be ignoring that situation, even though it might be really important to the discussion. It would be good to have some kind of data on this. For me, personally, if I have an optional activity to attend and there is no convenient way to get there, I will often change it or not go.