Companies like Uber, AirB etc do have some logic behind their extreme valuations however. They are truly global with exceptional business models. Both don't really have high long-term overheads - just app development - with other people doing all the work. And they can be huge worldwide concerns that a large percentage of the population use regularly.
Spurs will only realises the multi-billion pound figures you like to roll out if a super-rich fan or a more-money-than-sense state concern etc gets involved. Even Saudi Sportswashing Machine only raised 300m when the Arabs came knocking. Football clubs are not businesses that traditionally generate money. Most lose money don't they?
Of course with any entity that has sizable revenues, there will be ways to make profits. But how sustainable they are, and how easy it is to cash in the asset is questionable.
What is our % of revenue from ticket sales? For London, in probably the nicest venue going, our ticket prices are not out of kilter, truth be told. the narrative will fit your bias naturally.