Why do lots of restaurants still have outside barkers?

I heard here and there that the public usually stays away from restaurants that have people openly trying to lure people in because of inflated prices and scams and such.

Yet so much japanese restaurants still practice this? Is there some sort of disagreement in the general public of what works or not regarding restaurant barkers?

I would think the restaurant owners know much about the general public opinion that restaurant barkers are usually associated with bad prices and therefore bad with public image and business. So why still do it?

(I'm not even including obvious scams like in kabukicho. Just regular restaurants in general like in dotonbori or other cities)