Y’all overreacting, it’s not like Kidd is sitting on his hands & saying Luffy should beat Kaido. He’s fighting another Yonko atm with Law. Without Kidd & Law doing that Luffy will not be able to beat Kaido so Kidd is only saying Luffy better keep his end of the bargain.
Lit translation of what Kidd said was ‘That’s a given!’ btw, TCB’s is a paraphrase but the nuance is still there ^^