But honestly, different then Apoo, Hawkins is a man of rationality. He always acts following Odds and we dont know how far these odds reach. I can understand him, even tho he lacks on trust and heart here. But this will lead to a big character improvement of Hawkins.
I guess when hawkins comes into play again, he will see again that the chances for the win of Luffy and Kid are smaller. Maybe about 70/30 for winning of Yonkos. But in the first time, he will show trust in these two, get convinced and choose against his odds. So he puts the numbers by side and steps forward. Leading into an increase of the numbers by a few %, without him seeing it.