Have you met these people? Bikes are often louder because they are harder to see and want to be noticed to stay alive. Assuming all noise is to draw attention for some ego reason just says a bit about you.
FWIW, anecdotally and as a member of the motorcycling community, being loud does not seem to help much. People hear noise, but in traffic it doesn't help them locate the source of the noise. Things that do seem to help are primarily visual: bright solid colors, sitting high relative to traffic. Pretty much the opposite of the flat black low-rider with loud pipes.
Not saying you're wrong but there should be an upper limit. I don't need to hear a motorcycle coming from a mile away while sitting in my living room. That seems less effective in a safety sense since by the time you get anywhere near another driver they're so overwhelmed with sound you could be coming from all directions at once.