Hand picking stats? I'll give you some hand holding stats.
Can't go worse with raw data, right?
Tinsley played 505 minutes last year. During those minutes, the Jazz scored 1044 points. They gave up 1072.
Watson played 1032 minutes last year. During those minutes, the Jazz scored 1995 points. They gave up 1998.
In 2726 minutes Tinsley did not play, the Jazz outscored opponents by 69 total points.
In 2199 minutes Watston did not play, the Jazz outscored opponents by 44 points.
There is absolutely NO denying that out of the three possible scenarios, Tinsley on floor, Watson on floor, neither on floor, Tinsley being on the floor was the worst option. Tinsley<Watson<Neither. This is what you'd expect from backup and third string players.