Obviously you don't understand the dB drag "extreme" classes.
They are meant to be as loud as possible. No holds barred.
Hell, even most of the superstreet and a few of the streetmax cars can't be driven daily.
It's impressive because of the work and ingenuity it takes to achieve such a high dB level. If you don't think it's impressive, then you're just an idiot.
It's a hobby, just like any other hobby. I don't get why people see no problem spending thousands of dollars on collecting things like baseball cards or whatever else, but they automatically assume that this is just a waste of money.