Should this bother me?

Recently I asked my girlfriend about this and it’s something that does not bother me, but it seems to bother or worry her a little. I asked her the following, “Are you worried or does it bother you I can’t fight?”. She replied that it does a little. Now she’s trying to convince me to take up an offer on boxing lessons, and I have to be honest, I know she is doing it because she knows it will benefit me. In some way, I also think she is pushing me to accept the offer because she wants to feel safe? What are your thoughts on this? Would it matter if I knew how to defend myself, or would it not matter? I know she might be a bit bummed out if I say no to the offer, and I am thinking this is more for me, but something has to do with her wanting to feel safe knowing I can defend myself or her in any situation that presents itself. She is really telling me to think about it and I have a feeling she wants me to take the classes. So thoughts? Thank you.