I think this is the typical modern American bias of idolizing 'tech' companies - it makes a lot of money so it must be because it's very technologically sophisticated.

In reality I'd guess building an Uber scale tech company is not particularly difficult - after a quick ChatGPT query, it seems a city like New York, has about 90kish drivers at any moment - if we assume they make a query to the API every 5 seconds (and add once as many for users) - the scale doesn't look particularly daunting, something manageable with optimized tech on a small server cluster.

Sharding is trivial since New Yorkers are not really interested in taxies from Brussels etc.

And the proof of the pudding is there are tons of competitors, and most of them work just as well as Uber does (on the technology level, driver availability or market penetration might be a different issue).

Uber is a brand like McDonalds - you could say people go to McDonalds because they have the best burgers enabled by their superior logistics and equipment - and that's certainly probably a factor, you can't really ignore that they are where they are due to brand strength, availability, and early mover advantage - while also recognizing they are far from the only players in the business.

American tech companies have immensely benefited from being the 'default' providers of services - Google, Gmail, AWS, etc. People didn't give much thought on what they chose - and assumed everyone chooses them because they are the best, not because people lacked sufficient incentive to give proper consideration to what service they use.

Thanks to Trump, that has certainly changed in Europe at least, literally overnight.