I worked at restaurants where I had to report my tips or share them. If I dipped below minimum wage for the month, the restaurant was supposed to add whatever difference was needed (never saw it happen, btw).
So if DoorDash lowers the base pay, I don't see why anyone should die on DoorDash's hill when the base pay of all restaurants around them is a hilarious $2.15/hour. DoorDash pays a minimum of $1 per delivery no matter the tip.
Before people get too angry at DoorDash, they should realize this is ubiquitous.
We're never going to evolve away from tipping culture if our only trick is to get outraged at one company at a time that makes the mistake of having the spotlight fall on them.