I mean, that seems pretty unfair, no, giving one set of transportation companies an arbitrary advantage over another? This sort of thing is exactly why Uber started in the first place: because taxis had unfair monopolistic advantages for no particular reason, and gave customers a poor experience, because they knew they didn't have to do better to keep their jobs.
I have no idea what I'm going to get with those taxis waiting immediately outside the exit door. Even in my home country, at the airport next to my city, I have no idea. I know exactly what I'm getting with an Uber/Lyft, every time. That's valuable to me.
I was just in another country a couple months ago, and when trying to leave the airport, I was confused where I'd need to go in order to get an Uber. I foolishly gave up and went for one of those "conveniently-waiting" taxis, where I was quoted a price up-front, in my home currency, that I later (after doing the currency conversion on the Uber price) realized was a ripoff. The driver also aggressively tried to get me to instead rent his "friend's car" rather than take me to the rental car place like I asked. And honestly I consider that lucky: he didn't try to kidnap me or threaten me in any way, but I was tense during the whole ride, wondering if something bad was going to happen.
That sort of thing isn't an anomaly; it happens all the time to tourists in many countries.