Very few True FR QBs are so good that they start. Baker Mayfield, Jared Goff, and JT Barrett a few years ago; Jalen Hurts last year; Jake Fromm at UGA and the QBs for Va Tech and FSU this year. All were exceptionally good as True FR.
But most of the time a team playing a True FR either means the QB is stellar, or the rest of the QBs on the roster are not very good.
Playing a True FR QB also impacts future recruiting. For example, we missed on Marcus Marriota by having a starting Soph QB (Wynn) and Luke Falk because we had a starting FR (Travis Wilson).