Hi Isabella,
You are not being shallow. You know what you are attracted to.
If you already know that you aren’t attracted to these guys physically, it wouldn’t be wise to keep chatting with them. You would be leading them on into thinking that you are interested in them when you aren’t.
That would be a waste of time and effort for both parties.
You wouldn’t like it if a guy you found attractive on a dating app started having great conversations with you only for him to ghost you in the end because he was never attracted to you in the first place.