I like the Finchwik fairs, they're my favourite festivals because usually my Sims compete in them. I don't care much about the festivals in Mt Komorebi and San Myshuno, although I agree there's more going on in the latter.
It would have been nice if, fair ribbons aside, there had been other exclusive collectibles that could be acquired at the Finchwik fair, like commemorative teacups or teapots, or antique spoons (that you could display in a spoon rack) or any other type of décor in line with cottagecore style. It could have been something you can purchase from a vendor or maybe even find (like the snowglobes in the boxes in San Myshuno)