How unfair is this?

Once upon a time, a hunter worshipped Lord Shiva unknowingly on Shivaratri. He did this by dropping bael leaves on a shiva linga at the base of a bael tree from its branches where he was hiding and fasting all night. For this he was forgiven of all his sins.

I mean, we do a lot more than that right? And the hunter in the story doesn't even have the concept of God. Atleast he must worship by thinking of God or chanting God's name. Doesn't God seem unfair at times?