I read the original post a couple of times after reading your comment, and I don't get any vibe that he doesn't think we should be concerned about the impact of market forces on social wellbeing. Unless you're implying something about the taxi industry being a social good more so than Uber or Lyft, but that seems unlikely given that you have little sympathy for the industry.

I live in Chicago, and I don't know if Lyft and Uber are a social good, but taxis were too expensive for me, and now I have another affordable option for transportation. Plus all of the drivers I've spoken to seem pretty happy with their new source of income, so it's mostly the city and medallion owners that are losing out. The city can take action to help ease medallion owners out of the industry without defaulting as the demand continues to decline, and drivers are completely qualified for the ride-share industry. As far as disruptions go, this one seems pretty agreeable (I don't have much sympathy for the bureaucrats who are stuck between raising taxes and rooting out corruption and mismanagement in order to make up the difference).