I see the recklessness and dangerous speeds as symptomatic of their predicament: they need to get deliveries made as quickly as possible in order to make money. They probably don't like speeding, either. And due to ebikes and scooters, the range restaurants deliver to has expanded. Pre-seamless, restaurants usually were more local and stuck to a reasonable range for their hired delivery person. Nowadays, I can get a pizza from Crown Heights all the way to me in South Park Slope. That's kinda nuts.