I dipped Skoal when I was a teenage and up into my early 20s. Why? Because it's what people did where and when I grew up. In retrospect it was pretty dumb. You put a bunch of loose tobacco into your mouth (this is before they had little pouches like in the picture) and then every now and then when your mouth creates saliva you spit it out. Then after 20 minutes you take it out, getting it all over your hands in the process and leaving some on your teeth no matter how hard you try to get it all. Then an hour later you do it all again.
Tradition is where people do the same thing their ancestors did. But their ancestors may have done smart things or dumb things. So instead of just doing what your ancestors did it's a good idea to dispassionately assess whether what your ancestors did was smart or dumb. I'm going to put chewing tobacco into the dumb camp. This is even aside from the fact that it can yellow your teeth or give you cancer.