the entire business model of Uber is turn de facto employees into "independent contractors" so that all the financial risk is outsourced to them.
If you want to work for a company that only has employees, work for one. But other people prefer to be a contractor and earn more.
Established company taxis are cheap enough in Poland that I would have to be one miserably cheap SOB to want save a couple of zloties.
It's not a couple of zloty: it's a couple of zloty per kilometre. Plus faster service, better cars and nicer drivers. And they are all honest. And that's before we get to the convenience of going to a new city and being able to order honest taxis with no problem.