Kidd was a decent shooter for 3 years. The time before and after that he was/is borderline terrible.
He won a title while shooting the three at a good clip- which Vasquez has not shown the ability to do (29%, 32%, and 32% from 3).
You said Vasquez is a backup with no basis for that statement.
He can't shoot. He can't break defenders down off the dribble without a screen. He turns the ball over too much (though much better so far this year). He can't keep anyone in front of him.
Vasquez is a wonderful passer, great at running a team, has great basketball instincts and appears to be a good leader.
You want to compare him to Kidd because of their FG%? Fine. But Kidd was light years ahead of Vasquez in terms of passing, running a team, rebounding, dribble penetration, and defense.
At this stage in his development, I think he's too limited to start for a contending team. If he improves his shot- which is possible- things could change.
I take that to mean that you think that there are 30 PGs in the NBA that are better. Sure, I would love an All-star PG, but there are not 30 of those to go around.
So because there have to be 30 NBA starters at each position, we have to say those are starting caliber players? Morris Peterson, Rasual Butler, Dan Dickau, etc will strongly disagree with your logic.