Good point. I'd rather be somebody like him acting as a good infiltrator than have someone like Titania fight Team Meteor anyway. We can get good info out of him if we keep secret working together with him. On the other hand, Titania is too rash to really achieve anything other than lowering their numbers, which only helps in the short term. What good is the truth if a key member of the terrorist group is gone and can't help you out anymore?
Idk, just my two cents. It's pretty clear that the path of truth is the correct one here since you get a lot of info about the desert, which is a real shame. In a situation like this, you gotta think smart and not just throw away someone important to the wolves. Especially when they made it clear they're not against helping you when they know (think?) their bosses aren't aware of it.