The argument X "does not pay a reasonable wage for anyone to live on true" may be true for many definitions of "live on", how is no job better? Does Uber pay more than an alternate world with no job? Surely that is the question.
The idea that there is a gap in the market is something that people are looking for, on Hacker News most especially, and if this is a legitimate gap that Uber and Lyft are ignoring for silly reasons, then there should be a bunch of startups to take their place pretty quickly.