"Destroyed" is an unfortunate term to use. The drivers and riders will benefit who are predominantly not rich, so its actually a kind of stimulus.
No arguing against the environmental impact of course, other than the hope that cheap ride-sharing reduces the likelihood of car ownership.
We would be better off calling one side the winner and just giving each person using uber and lyft the subsidy in cash and letting them spend it in the most efficient manner.
Digging holes and filling them has zero economic benefit. That is the difference.
I see a price war that results in a loss of transport competitors as being long term negative. This doesn’t exist with hole digging.