Yup, you can miss on both. The downside is still the paying extra to possibly end up with a normal female.
I would only consider a possible het if the other genes on the animal are worth it or if the price was amazingly low. Even with a het to het breeding, you might miss the odds on a clutch and end up with no visuals. Rare, but it happens. The odds gods can be cruel. I'm going to agree with what was said about having a at least a visual on one gene like breeding a pied 66% clown to a clown 50% pied would be a way to test breed the possibles and at least end up with 100% hets in the offspring.
In my own breeding, I hatched out 50% hets for hypo.
The pairing was:
Super Pastel Spider Lesser x Mojave Special Pastel Enchi(het Hypo)
The hatchlings were all Pastel Blue Eyed Lucy(50% het Hypo). They might have been super pastels or had enchi. 3 of them looked like they may have had spider because I saw what might have been wobble.
Aside from disclosing the parent's genetics and which ones looked like they might have spider, I sold them as Pastel BELs. No extra cost for the possibilities I couldn't prove. I left the fun part to the new owners if they wanted.