I don't see why. For clarity, since we probably agree it's wrong, imagine you're making the same argument for cannibalism instead. One person says, "I'm fine with eating and farming humans but if I get to know one first, doing it would make me feel bad." Another says, "Screw that, I'll eat anyone, even if I know them and their children!"

The second person is more morally consistent and also more callous.

The consistency difference seems minimal. The most obvious moral rule in play is "Don't do harmful things to those people who are socially near" combined with a moral indifference to cannibalistic farming but acknowledgement that it is undesirable to be so farmed and eaten. This isn't a complex or unusual morality system (where arbitrary complexity seems to be what we mean when we say 'inconsistent').