You are perfectly OK to choose Uber whenever you like and it is aviable for you but the rest of your post is just invalid.
> Sure, like you said, there are nice taxis therein Poland regulated
> by the government. And then there are all the other scammers around.
And what makes you think that Uber are not scammers? What real jurisdiction Uber has over transport in Poland?
> Now, me as a tourist, I land at Krakow airport and I have
> no clue which is which and I may as well end up in a shitty dirty
> unregulated cab paying 5x the fare
Well I don't know the airport in Kraków but Warsaw airport has like five accepted taxis which can pick you up straight from the terminal. Other ones (if you order them) can drive to further pickup lanes on the airport. So it is really not longer a problem with scammer taxis on aiports in Poland (it used to be). The same is for major railway stations. You can safely pick the ones recommended by airports - they are not the cheapest (in 2,4z per kilometer range) but they are safe.
> call a Uber driver and be sure to arrive at my destination in an accountable
> transport that charges me the minimum fare possible for that trip.
What makes you thint Uber is accountable?
> Guess which one the users choose.
I guess they choose airport aproved taxis.