are you guys kidding, heck ya it makes you stronger and faster!...
+1. With the caveat that if your tours involve riding very slowly on flat terrain for short distances like fifty miles per day, you may not get much performance benefit. If you can enjoy touring while riding all out for part of the day, stick to the hills as much as possible and are good with daily centuries, then you will end the tour stronger, faster and with better endurance.
There is no "right" way to tour. What I enjoy would be awful for most people. What others enjoy about touring often leaves me cold. It's all good.