if voting doesn't matter for the average person, why do so many of the powerful people in charge try so hard to keep certain people out of the process?

I think, after this election especially, voting is actually beginning to matter for more people. I think our population is (hopefully) beginning to realize that they can have an affect on who their leader is. A reason a powerful person may not necessarily want the average citizen to know this is because they want to stay in power. If we don't know we can make a difference, we can't hurt their power. A horrible way of thinking, but unfortunately the way many power-craving people behave.

what do you mean by certain people?

but in general powerful people like politicians and government officials do this most for the benefit of their self or the government. for example, lets say texas people 20 under are more likely to vote I dont know.. Democrats (not a true fact just a example) or just bad decision making skills at that age.a Republican representative might limit the age for voting in that state to increase chances of winning and a more thought iut choice between the 2 partys.

a, a knight