It's not about what you are legally allowed to do, it's about the basic traffic principle that those inside bigger/heavier vehicles are responsible for the safe

It's not about what you are legally allowed to do, it's about the basic traffic principle that those inside bigger/heavier vehicles are responsible for the safety of those outside. The same principle that applies to cars -> cyclists applies to cyclists -> pedestrians. You can try to justify reckless behavior however you want, but saying "I had the speaker blasting on high to warn pedestrians" is never going to be a valid excuse if you get to run over an elderly person with hearing problems or a distracted child.