I don’t know why people tie themselves into pretzels over this: it’s simple math. Two thirds (2/3) of eligible voters don’t vote. If only 1 in 3 people votes, it is true that 1 person will be making decisions for him/herself – plus for the other 2 people who didn’t vote.
There is nothing noble about voting, but it is a pretty sure-fired way to show your elected official that you are willing to show up at the polls. This sends a clear message that you can vote him/her out of office – which is their job – if s/he doesn’t represent you well.