most of these passengers are also just carrying a single person. The car industry has won the culture war and convinced everyone it's normal and sane for every individual to have a car and use it all the time instead of investing in our public transportation infrastructure
We're about to have rail strikes in the UK. I asked a taxi driver in London whether he gets more trips/surge, and he said it gets more than negated by the added traffic.
And that really brought home how a public transport infrastructure also massively benefits drivers. Cities without it (I'm thinking of LA specifically) are gridlocked.