Some people can't pedal very quickly and wouldn't buy a bike that's too slow pedaling at just 60 RPM.
A 48x12 or 44x11 gear is more than enough when you're not Eddy Merckx who used the equivalent 53x13 to dominate the pro peloton.
Eddy was one of four men to win the Tour de France five times.
With his first victory in 1969 he also won the green and polkadot jerseys. He'd have taken the white jersey for the best young rider if they awarded it in 1969.
Unfortunately, most people don't feel that way.