For some I'm sure it is, but another reason is that it's generally seen as a bit more difficult to breed a lion with a lot of desirable traits without inbreeding, as you have to keep getting new blood. So lots of people, myself included, enjoy lions that have many desirable traits i.e. breed only markings, bases, etc. that are also non-inbred.

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I agree with Thalath. A lot of people like the challenge of having clean lions, although it can be for many different reasons. Some people like having clean lions for the challenge, higher value, moral reasons, etc. There are also a lot of people who don't mind dirty lions and even make it a game to see how dirty they can make a lion. It really all comes down to your preference.

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In addition to it adding a layer of challenge / prestige, it's a pretty common playstyle for people to try to avoid inbreeding, so non-inbred studs / lions tend to have a broader appeal to other users. People who breed 'dirty' probably won't mind a 'clean' lion, but the opposite is usually not true. And all offspring that inbred lions beget will have inbreeding in their heritage as well. It's really a matter of personal preference, but because preference is a pretty significant factor of the market, it reflects in things like pricing.

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