Well, if the company's business is connecting drivers with riders, there isn't much engineering involved in growing the company. Pricing, handling investors, PR/advertising and working with municipal governments does affect your growth. The exact details on how you store the destination's GPS coordinates in the database don't really matter. A good product manager who understands usability and can communicate their ideas to the management can add some value, but having a 20% lower price than the competitors do will make 90% of the users ignore any usability hiccups.

Hiring thousands of engineers to maintain a process that only needs a handful is perfectly reasonable, since the investors don't understand tech and generally like the head count. So this is critical for raising VC capital needed to subsidize the rides, that in turns gives great growth numbers.

A typical developer doesn't understand these mechanics. And even if they did, the only alternative to delivering useless unneeded results would be to resign, except good luck finding a competitively paying non-bullshit job in the current market.