Something like a CBR300F is about half the emissions of a hybrid and a grom can get lower, but plenty of motorbikes are actually worse than a compact car and getting close to SUV territory.
Still more aerodynamic and fuel efficient than someone riding a full-blown SUV to work solo.
> but plenty of motorbikes are actually worse than a compact car and getting close to SUV territory.
Not everyone drives a Kawasaki Ninja H2 R with 310 hp or whatever the top record is these days. Per German ADAC, the average motorcycle consumes 2-3 liters/100km [1], whereas the average car is at 7-8 liters/100km [2].
[1] https://www.adac.de/verkehr/tanken-kraftstoff-antrieb/tipps-...
[2] https://www.umweltbundesamt.de/daten/verkehr/kraftstoffe
Part of the reason is that it's so fun to go fast with them.
For one, more strictly enforce technical fitness and some form of age requirements. An awful lot of people don't care much about the roadworthiness of their vehicle, and many don't care about technological advances like anti brake-lock systems in newer models as well.
The other major contributor to motorcycle (or bicycle) accidents is road conditions like potholes, dirt and especially oil contamination, bumpiness in roads... a car doesn't care much (unless it's one of those super-flat sports vehicles), but a cyclist can easily lose control.
On a scooter not, but on a Harley or Honda Gold Wing? People make trips across Europe on these beasts.
For what it's worth, I've never driven a motorcycle and probably never will, for danger.