one persons ducati is another person old "common" cbr600. Based on our financial state and "psycho-social" build we tend to preserve our stuff or neglect our stuff. Be it a car, bike toy what ever. rich guy garage queens a lambo and poor guys wash and wax and maintain a civic just the same way as long as they love their car the same way. IT doesnt matter how rare or how valuable it is.
That means the average guy who loves their bike doesnt feel comfortable renting their bike. Statistically Bike is more of a personal attached asset/toy/ luxury in these parts compared to car which is considered by most as just a utility. Statistically there is higher chance of people messing up on a bike with lot more damage than the oppsie moment on a car. And basically human beings are flawed and by biological design is looking for self preservation/ asset preservation/ their own family preservation/ ... in short to be selfish. Just the level of it varies from time to time. Its not wrong to worry about imaginary accidents to your stuff/ imaginary illness to you family over imaginary injury to strangers.
to summarize the big wall of text. , I do me, you do you and every one else do themselves. There is no right or wrong answer here. IF some one doesnt want to risk renting their bike for what ever reason they shouldnt. Some body else is comfortable renting it so be it.