I can guess from your comment you have not been to Phuket for at least a decade.
Apart from that main walking street and the OTop, there are no other main areas with bar girls etc, even now in Patong the vast majority of tourists are couples and 90% of previous girly bars have been converted to hotels/shops/restaurants.
I think all of the sex tourists migrated to Pattaya many years ago.
I was there for the first time in a year just for one night this week showing a visitor the restaurants etc in Patong.
On other days I took them to the various viewpoints, temples, mountain areas/elephant camps around the island which make up 99% of Phuket attractions and scenery, Patong constitutes 1%.
I suppose if they had spent all of their holiday in Patong walking street as you might have done maybe they would have had your experience of Phuket and have missed out on what else there is to offer here.