I understand completely, but you want people to buy from you because of quality. People are buying hets because they want to make visuals but can't afford them. At this point it is more of a quality issue. I replaced a snake that died over a month after it sold. They guy never got it to eat and didn't contact me until it died. I could have said "sorry dude" and done. One snake here and there is good business and standing up for your quality.
That is a different scenario than the genetic assurance topic my paragraph you quoted spoke to. While there are other reasons to buy hets than cost (I buy hets and homozygous animals and not for lack of budget when I buy hets), I do agree with you regarding why most people purchase heterozygotes instead of homozygotes.