It is pretty easy for us to use a scent, see a buck and put 2 and 2 together. Sure, there are times when a buck may be looking for does and happened to cross a scent path downwind of your scent and come look for the doe. It happens. Deer are also curious at times and will investigate interesting odors. I've never used smoke sticks in particular, but I've messed around with a lot of scents over the years, back when deer urine was legal in my state. I have to say, when I stopped using it, I found it was one less thing to setup, and my deer harvests did not suffer at all.
There is one place where I was able to use scents successfully and that was bow hunting. I did not use them to attract deer, but to position them. I would put a little vanilla extract on a cotton ball and place it on a branch just out of reach of deer in a shooting lane. Deer would often come by my archery stand but never step into a shooting lane or give me the right angle and I'd just have to let them walk by. With the use of the vanilla extract, every deer that came by me would eventually go check out that cotton ball with the vanilla. They would sniff it for a bit and move around it, and then eventually just move on. By placing it in a shooting lane and the deer pausing to investigate, my chances of the right shot angle increased significantly.
That is not to say I never killed deer using doe-in-heat or buck lure type scents. There was never enough consistency that I could say I would not have killed that deer without it. One more thing that I observed, was deer coming in, catching the wind from a buck lure type scent and turning tail and running. I even saw this when the deer first walked up and put it's nose in it.
In my experience, they are hit and miss, and I don't at all regret the change in regulations eliminating their use.