Their customers want easy delivery options that's definitely true. But if you could ask them if they think restaurants deserve a chance at fair negotiations they would probably also say yes.
All the bill is asking for is cooperation up front, not afterwards if at all. It's not criminalizing the business model of DoorDash and friends, it's just forcing them to treat their business partners like business partners.
I think it's fair to say I have some bias here though. I am a little bit too cynical toward these companies to believe they're just out here trying to better the world. They're doing their best to spin a buck before going public and peacing out. Case in point, DoorDash just IPOd with no profit and no projection for profitability, even in it's best case scenario (massive increase in online ordering).
So obviously the service is extremely useful, people find it useful while it's subsidized but no one has yet bared the full cost of these platforms.
In my opinion we need to protect existing businesses who are profitable and thus have a proven place in the economy, while these disruptive companies flail about free from the shackles of actually fitting into the economy, just in case it turns out they wouldn't.