I mean sure, but that's not exclusive to Christianity; forgiveness can be learned anywhere, including through lived experience. Yes Christianity features forgiveness prominently, but it also prominently features fish and certainly you don't think you can only acquire seafood from the pious.

So practically you can appreciate and accept the philosophical lessons offered by Christianity while still rejecting the Christianity of it all in the same way that you can appreciate and endorse live music by buying tickets through Ticketmaster while also criticizing Ticketmaster for all of the awfulness they unnecessarily bring into the concert-going experience.