He was a Bishop and a Stake President (which is similar to Bishop in the Catholic Church - someone who is over many congregations) in the LDS Church. He can't say that.
The mormons don’t have seminaries, and bishops aren’t necessarily theologians in any denomination.
In any case, a bishop in the mormon church (from my experience) was similar to the pastor of a local church. He wasn’t necessarily over a large region with dozens to hundreds of churches. But, even those regional bishops aren’t necessarily theologians.
I know of one current bishop, for example, who was a successful Christian Camp leader.