My message starts with "it's a reason among others".

And bike-centric policies have led the city to invest in bike lanes, rather than in the aging public transport and to remove surface parking, making it almost impossible to own a car if you have a family. All of this is in the article that I linked.

An unexpected casualty of this is that it's now complex to get trade workers to come to Paris for construction jobs, and, funnily enough, public works to build bike lanes are more costly as trucks and workers spend a lot of time in the traffic now.