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Bicycles is worse than mopeds and scooters.
The need to fully straighten your leg when pedaling requires you to raise the saddle high, which leads to a too high center of gravity, which makes the bike less controllable and easier to fall on.
This also makes it difficult to climb onto a bike - on a scooter I can instantly stand up and sit down, on a moped you just have to lift your leg a little, on a bicycle I have to move the pedal to the desired position, stand on it and lift the other leg very high to finally sit down. With a rear rack, the process of getting on turns into hell. A telescopic dropper makes this easier, but firstly, it is not enough, and secondly, they are unreliable, have backlash, the switch takes up space on the steering wheel and needs to be pressed every time.
Very low efficiency relative to the energy expended by a human(not the transmission), which could be spent on a more useful thing.
Pedaling is an absolutely unnatural physical activity for a human that leads to problems with deer, if you want to lead an active lifestyle - go to the gym or hiking.
Bicycle parts are less reliable, break faster than scooters and mopeds, because absolutely everything is brought in for the sake of less weight. At the same time they are much more expensive. This is very clearly expressed in the example of dual suspension bicycles.This is very much true for shock absorbers, tires and transmission. A full-suspension bike is ridiculously expensive, expensive 12-speed transimission and shimano chains that have a resource tens of times shorter than a gearbox with a motorcycle chain or even a CVT with belt
Most digusting is road cyclists with narrow tires, rigid fork and frame, agressive high seating position, AERODYNAMIC clothing. Sane person does not mind spending extra liters of gasoline or watts of electricity on better grip with the road due to thicker tires and soft shock absorbers, on greater air resistance while riding in his favorite loose clothing.