So the truth is I don't track the Kittypet Colony, Valleyclan or Wanderingclan. Both clans are Much Much larger than Ranch (Valley can sit at around 100 cats, Wandering upwards of 300! Kittypets sit closer at a reasonable 15) I'll track some specific cats and lineages, ie like a Dramatis Personae, but leave a significant amount of No-Name population to pull from.

Frostbriar still practices Ornithomancy! Birds are seen as messengers of Starclan, and because of their sky-eyed view, can transfer information of prey/water locations, danger/safety, yes/no answers. Not all Valleyclan practice it - sort of like tarot there's varying levels of belief in it vs if it's random correlation. Laureldapple doesn't actively practice it the way Frostbriar does,,, but that doesn't mean she won't take it into consideration when Frost does it.

is viewing warrior-hood as “better” a common opinion in ranchclan/valleyclan, or is it one only held by a few cats?

so I don't think it's an "active" prejudice that warriors hold and is much more a passive social phenomenon - friendly rivalries that spiral, kits who take what their parents say seriously/literally and then perpetuate the judgment. Clerics have their own sort of biases about warriors being dumb or brutish, it's just less noticeable systematically as there's less of em. I don't even think warriors see it as lesser, but maybe boring or nerdy - glad someone else enjoys it so they don't have to. I think there's a little judgement towards mediators, don't know healing or fightin', but also everyone knew Posythorn hated being a warrior, and was no good at it either.