If you dont need it you dont need it.
I get almost all my customers via the internet, its a great tool used properly.
Not so many via website but Lead Generation, social media, etc and reviews certainly help.
It is open to abuse but the idea is you should aim to drown bad reviews with positive ones, afterall 98% positive looks more authentic than 100%, no one is perfect.
However if you dont push positive reviews the only ones you will get are negative.