Kench Gets Benched by Olaf

Tahm Kench can't eat an ulted Olaf, because Olaf becomes immune to cc like Kench's W. I get it, Olaf's ult IS his ultimate ability so of course it needs to be strong. I would argue though that Kench's W should damage Olaf even if Olaf is ulted. If Kench can't eat Olaf, his W should at least "bite" Olaf and do the damage of his ability. Olaf is immune to cc, not damage.

URF is great for exaggerating champions abilities and highlighting abilities for OP strengths and underwhelming weaknesses, and the Olaf/Kench interaction is extremely unbalanced. What do you think of Kench's W still damaging an ulted Olaf?