I'm not sure what point you're trying to make.
It's beneficial that Airbnb is so big because I can plan a cross-continent vacation using one website instead of searching for each city's/country's version of it (which may have poor customer service or be ran by scammers).
It's beneficial that Uber is so big because I can use one app to summon a car anywhere around the world instead of having to install a new app in every city/state/country.
Just because 10 companies could provide the same amount of service and jobs doesn't mean that it's beneficial to customers.
The question the OP is addressing is about growth limits in Europe, not about the moral value of large companies.
EDIT: I am not arguing for monopolies. Multiple companies with service around the world can and do compete.