The test might be perfectly adequate to decide whether you should do a PhD. However, I can't stop thinking that tests where the outcome is based on Mostly A's

The test might be perfectly adequate to decide whether you should do a PhD. However, I can't stop thinking that tests where the outcome is based on Mostly A's (or B's or C's or ...) are designed for pre-teen pupils deciding whether they should break up with their this-week boyfriend or have a chocolate or vanilla ice cream.