Responses
Normally I would agree with you. But don't worry, this manga is wholesome to an unreal level. Almost everybody is super nice, so you don't have to worry about him being taken advantage of.
******SPOILER*********
Ryoma actually decides to move out and live on his own on the city they visit. He is still friends with these nobles though.

but if this were darker, this noble family is using their daughter to extract all useful info and magic from ryouma.
I just cant stomach having this much ability and power only to become some noble family's lap dog.
Sure its good to help people but damn don't cough up everything, your worth is only equal to what's unique to you.
As of now he gets affection and love(?) in exchange for his stuff but what happens next mate?
Trade it for something tangible, think of your future man