the question is why you aren't referring to the existing businesses that do this, the kebab shop with casual delivery driver or the cabbies renting a car/radio to anyone with a drivers license. why does an objection only get raised when its a large, high profile company. all those smaller...
what exactly are "these companies"? seems to me a broad brush being applied to a range of different businesses, while overlooking the long established practices they are replicating, which apparently no one notices or objects to.
thats it in a nutshell. however they are also branching into doing their own food, hence the kitchen in Hove. presumably you'll have Deliveroo branded menus in the Hove area.