That was absolutely not the original vision.
The original vision was that they would somehow be a profitable concern as a taxi company despite the total lack of barrier to entry because, um, reasons. That they could create an app that was hard to compete with. In all fairness, it wasn't super clear seven or so years ago that there would be so relatively little innovation in the app after the core business of hailing happened.
Then, they would expand into being a logistics company. They used to talk about this all the time. Taxi -> logistics, Uber for things. Uber Eats was supposed to be part of this, and they did a bike courier service in NYC that was supposed to be part of it and several other experiments.
Then, when self-driving tech came along, and they were probably thinking like mid-2020's (hardly anyone in 2010-2011 believed that self-driving would go as fast as it did), their vast profitable concern would be well-positioned to get even bigger.
That was the original narrative. It wasn't hidden, they talked about it a lot. As little as about two years ago, their redesign was heavily concerned with positioning themselves as a logistics company.
But what happened is:
1. They've never been more than razor-thin profitable in certain very favorable markets as a taxi company, and obviously overall are grossly unprofitable as a taxi company.
2. Nobody in the entire world wants their logistics business. The only company who would be even remotely interested in it is Amazon, and Amazon laughed and said, "Nothing about your taxi business makes you well-suited to do logistics, we'll just build our own version kthx."
3. So now they spun up a self-driving car program out of nothing a couple of years ago and have desperately pumped cash into it. Hoping that they can somehow catch up with companies that are both substantially better-resourced than they are and who have multi-year head-starts on them, or, more cynically, that they can play some kind of pixie dust story into an IPO and dump their losses on dumb money.