Because Uber is the market leader, with the most investment, and with the largest subsidies. Given your short posting history's unusual interest in Uber stories you probably know about that already.
From what I've seen based on leaked financials, Lyft is outspending Uber by more than 2x in terms of subsidy dollars per ride [0]. Subsidies do not scale, and Uber is subsidizing less per ride than its competitors so it's surprising to me that it receives the bulk of the criticism when it's actually far the most thrifty of the ridesharing companies. If anyone should be criticized for buying their growth, it should be Lyft, not Uber.
From what I've seen based on leaked financials, Lyft is outspending Uber by more than 2x in terms of subsidy dollars per ride [0]. Subsidies do not scale, and Uber is subsidizing less per ride than its competitors so it's surprising to me that it receives the bulk of the criticism when it's actually far the most thrifty of the ridesharing companies. If anyone should be criticized for buying their growth, it should be Lyft, not Uber.
[0] https://news.ycombinator.com/item?id=13772168