I thought the UK was big into competitive bike culture, what with having big champs like Cavendish and Froome, the Ineos Grenadiers being based there too, as a really successful team.
This seems a very strange observation to make about London. It actually has the lowest rate of car ownership of the cities in the UK.
In my experience the primary mode of travel is public transport (or it was before Covid-19 at any rate), with people occasionally using their cars for trips outside London and perhaps larger shopping trips. Though this clearly varies by Burrough, with those on the outskirts of Greater London being more car focused than those near the centre.
It was an observation about the UK.