The logic of it makes sense, and it's compelling, but he's aware enough to realize that it's compelling because he wants it to be true.

On the other hand, jokes about magical lie detector kisses aside, Tony really is starting to be able to tell when Obie is bullshitting him. He doesn't seem to be.

It's not really okay and it's not really enough, but somehow it's okay enough. Some of the tension goes out of him.