I think it's great for beginners (speaking out of experience). How do you start out? Get the software, watch tutorials (youtube lsdj guides). After that watch advanced shizzle (danimal cannon, animal style). Some time after ask some CC from people who are doing this for some time. I just think it's a good and logical step somewhere in the process. And I'm happy to do it here instead of 8bc where the reactions are more mature and do actually tell you something that could be helpful.
I didn't learn guitar without songbooks and/or a teacher, why should chipartists do it completely on their own?
If you make up a riff, you're going to ask your friends what they think about it.
I think it's a great way to help newcomers to chip, because that's what Belgium needs to my opinion. But that doesn't mean it's the only use.