Being trained as a soldier does not qualify someone to be Commander-in-Chief. Effective delegation skills, critical thinking and keen judgement are far more important.
Similarly, wielding the power of a private enterprise does not require experience in each company role from driver to salesman. Surprisingly, it is a liability as the typically difficult transition from entrepreneurship to professional organization demonstrates.
Being trained as a soldier certainly does not qualify someone to be a voter.
And while performing military service is admirable and necessarily contributes to a secure and functioning society, so is being a teacher, a doctor, an engineer or even a mother.
All deserve access and voting rights.
Wrong.
It is the soldier who guarantees that teachers can teach, Doctor's can practice medicine, engineers can design and build and Mom's can raise children absent the presents that islamonuts (et al) would like to deliver to America. Mitt Romney was just taught this lesson.
But you are right in that they all have a constitutional right to vote.