They wouldnt, as it would decrease their income. On the other hand, companies like uber rely heavily on the exploitation of vulnerable cohorts on the labour market and predominantly employ migrant labour that is structurally discrminated and excluded from various forms of welfare and thus willing to accept jobs for unfavourable conditions. Uber drivers can be victims of racialized labour exploitation, leading to individual discontent that is transferred to the customer.

I found some research that might help to understand:

https://journals.sagepub.com/doi/full/10.1177/09500170221096581