Same question when I was a noob back then, and remembered really well what my mentor taught me with this examples and I found it really makes sense.
The analogies used :
- Resolution -> Power
- Frequency -> Speed/Agility
A big truck -> Big power (High Resolution) but low speed (Low Frequency) , and its capable of carrying heavy load.
A sport car -> Low power relatively to big truck (Low resolution) but high speed and acceleration (High Frequency), also can make tight turn at high speed because its weight less compared to a fully loaded truck.
Now, normally you just can not ask the best of both worlds, like you want a car as fast as the sport car "AND" capable to carry tons of stuffs like a truck, and also it must able to make a really sharp turn while fully loaded at high speed.
The audio ADC is like the heavy duty truck, and its enough since our ears have a limit, while scope's ADC is like the exotic sport car.
Ok, what if you keep insisting a truck capable of carrying tons of loads while have the acceleration and maneuverability of a sport car ?
Well, maybe you need a special designed truck with huge rockets installed, and capable of firing those crazy powerful rockets like the one that used to lift Apollo 11 to the moon, and also have them installed at all sides of the truck so it can stop or accelerate like a sport car, and also the truck can float to reduce drag while those installed gigantic rockets firing at the right angles and sequences to make those cool tight turn.
Now, do you have your money ready to buy it ?
Hope this helps.