motorcycles and scooters are incredibly popular in Europe and developing countries…they are inexpensive to purchase, insure, operate, efficient, easy to park and also fun.
When I was in Rome I rented a scooter and it was so easy to park it right in front of the Colosieum because I could squeeze it in a spot, a car would’ve been impossible, infact this time in Europe I had a car and it was a MAJOR pain to park.
As for danger, the more number of them the less dangerous they will become. The danger is often overplayed, when riding you just have to be very alert and defensive and you will be fine. I’ve been riding all my life and have yet to meet with an accident.