w.l.
Bahhhh...
So we should never breed for any different mutations ever again other than the original, and never have any white birds?
It's like saying, we can't improve on Leonardo's Mona Lisa, so no one should ever paint another portrait again.... we can't improve on Michelangelo's David, so no one should sculpt again.... If these two and many others, had adhered to this philosophy we would not have had their works to awe us today.
I do agree that the normal Gouldian is a stunning bird.
Breeding different mutations, is not necessarily to improve on the original, but to create something new, perhaps not better, but different and hopefully as beautiful nontheless.