If I do KNN mainly, then all my SH would be from the KNN. KNN would be more serious 🤷♀️ ISH you can breed to everything and get an ISH so yes, they can be easy.
I have not yet bred a WWW. ISH are too easy for me- and I do not like their art. I can do KNNs and SH together- I like both art and I would be less sad if a good KNN turned out SH lol