My Puppy Has A Question

I got a puppy two months ago and am training him to do his stuff outside.
A trainer taught me to give him treats and ‘Good dog’ affirmations and I saw how slowly he almost takes no interest in other dogs nor nature while we go out for a walk. All he cares about is that tiny pouch and the hand that keep giving him treats.
He walks and keeps looking back at the pouch and my hand, wanting more.

I then thought – What have I done? I created a monster… 🙂 He doesn’t care about socializing or sniffing trees, all he wants is those damn treats.

I know it’s beyond the scope of your pay, but if dogs have only primitive brains that seek pleasure, shall I just take him out, not give him treats anymore and he will learn to not desire them?