There was intervention and it didn't happen to me, but it could have. Oh, and then there's noise - breeding pairs are noisier than pets. Some can screech so loud you think your eardrums are burst. Quakers don't have quite that volume, but the quantity makes up for it. I re-sold them after two months because I couldn't stand the noise.
Breeding is a big job, and a major commitment.
It can break your heart, take up ALL your spare time, and spend all your money. And I can't tell you exactly why. I just know I feel incomplete and unfulfilled when I'm not doing it. Two, I think that there need to be some breeders like me. Many breeders still keep their birds in small cages with no toys on the theory that if they have nothing else to do, they'll breed.