Personally I find motor bikes to both look and seem dangerous. I have no proof but to me it’s a lot safer having a crash at 30 miles a hour in a car at least you have a chance as opposed to be thrown off a bike at 30 miles an hour . I also find motor bike riders aggressive when they weave and roar past you on roads .
Motor bikes also seem to attract the long haired, big bearded, heavily tattooed bikers which lets face it with all due respect was never a good look .
As with any vehicle, how dangerous it is is largely in the hands of the operator. To a smaller extent, it's also in the hands of the operators of other vehicles as well. I learned to ride as a teen, then had a 6 year gap after moving to the UK from Aus, before taking it up again. All told ... would be around 20 years experience. The closest I came to an accident was when a car decided to try turning right from a left-turn-only lane at a roundabout when I was turning left from the centre lane (as I needed to go right at the next roundabout about 100m up the road). Spotted what the idiot was doing early enough to pick the bike upright, brake, and only lightly clip his wing mirror as he also hauled on the brakes.
As for the hairy biker stereotype ... put it away. There's far more bikers who are respectable professionals such as doctors, lawyers, accountants, police, etc etc than there are fringe gang bikies.