It is silly to assume that a poor quality animal will produce high quality babies. You should never purchase a low quality animal and tell yourself that there is a possibility of it producing some really great specimens.
If you want to produce high quality animals, you need high quality breeders. Of course there will be some variation and some bad examples will hatch from time to time, but this does not mean that you stop selectively breeding altogether. That makes no sense.
Not everyone can afford the highest quality morph. They have a few options though. Buy a lower quality animal and pair it with a higher quality animal, or wait to purchase the higher quality animal.
I feel like there are way to many people rushing into breeding by buying morphs that are low quality and in turn producing low quality animals. Pastel is a perfect example of a morph that has almost been completely ruined by (in my opinion) irresponsible breeding.
I can't tell people what they should and shouldn't breed. I am only responsible for my own breeding practices. I can only encourage other keepers to wait on that brown looking pastel until a nicer one pops up on the market.