Then he adds that any sex workers he might have met were all in their 20s or older
Yeah, who actually believes he bothered to check anyone's ID, that he even had the capability to verify their ages or didn't care because "don't they know who he is?!".
Everyone will always have that bell ringing in the back of their heads now, "why exactly was he going specifically to Thailand".
I think you're closer to the truth if you start with the assumption that every single thing that comes out of his mouth is a lie, designed to excuse himself from accountability and to justify his behavior. This is just more lies IMO.
His "totally convincing" statement reminds me of this: