Trees

I'm thinking about getting my first hand pipe and have been looking around. When I roll a joint, I always roll with charcoal filters, and I'd like to keep using filters when smoking a pipe. Now, this is the absolute standard for tobacco pipes, but for weed bowl pipes, it's apparently not?

I don't get it, it filters out harmful stuff, it's cheap, easy, already normal for joints, but somehow, no nice glass bowl pipe I find has a mouthpiece that allows for charcoal filters.

Am I dumb and there's a trick to using filters with those pipes I'm not getting?