I see just the opposite, and I don't even smoke in restaurants.
Perhaps that’s a reflection of where you live. Ever since I was a child, it’s always been the case at a restaurant that if you want to be seated faster, you sit in the smoking section. (Now it’s called “first available,” which invariably means the smoking section.) Everywhere I go, people are willing to wait to avoid the smoke. I’ve been to plenty of local restaurants where there are almost always seats in the bar area while the nonsmoking wait approaches 30 minutes.
My experience before the anti-property rights crowd gained ascendancy and banned smoking altogether was the same as yours.
There was, more often than not, a wait for seating in the smoking section.
Same in Nevada.. before the smoking “ban” (Its being ignored for the most part)
When we were allowed to smoke in restaurants the smoking section was ALWAYS full and the non section was quiet/empty.