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I think it's because they evolved to bite humans and animals sleeping outdoors. The night is full of sounds of crickets, frogs, and other creatures that can drown out a mosquito's hum.

Quiet bug-proof houses are a new invention. Very few mosquitoes successfully make it inside, bite, escape the building, and find a suitable place to lay their eggs. If most mosquitoes get killed after entering the building, natural selection may be pushing for mosquitoes that don't enter homes at all.

Ticks on the other hand are silent, migrate to hard to locate parts of your body, you can’t feel their bite and are very crush resistant. When can we exterminate them all?

By the time they have got to your ears, they've already procreated and made thousand more like them. You swatting one doesn't matter evolutionarily.