Confused by this use of "perder"

[createdamadman]

In this passage below, the speaker is jokingly referring to a man who is a banker and who has been trying to push the listener into selling her home. I feel like this is basically saying that manners are lost on him because he is focused on money, but the way it is written is just not making any sense to me. To me, it reads like "manners and money are lost for him... which does not turn him into a good person", and that just doesn't make much sense.



"Es buen hombre, pero le pierden las formas y el dinero, lo que después de todo, no le convierte en buen hombre —apostilló Andreu, riendo los dos a carcajadas."

[AngelicaDeAlquezar]

In this case, "perder algo a alguien" means that the "algo" caused a harm to the person.
The sentence says that the guy's weakness for formalities/manners and money is what reveals his true nature despite his appearance of being a good man.