If you made an agreement to breed her with whomever you acquired her from, then, unless there is a reason you should not, such as a disqualifying conformation fault or temperament fault, then you have an obligation to do so.
Otherwise, it is completely up to you.
The one annoying thing about having intact bitches, is that it interferes with training and trialing in AKC.
I think that spaying for convenience is fine, but I would prefer people wait until they have reached their full size, 18 months for females minimum. But that is certainly a matter of opinion.
Heidi Ho, Odie
Joy-Joy, Bear Cub, Hepsi-Pepsi
Cujo2, Karma Chameleon
Ramona the Pest, Kojak -- who loves you baby?
Tiny Tinnie, Susie's Uzzi, Kaiah -- The Baby Monster.