Cutting out these sections - along with all images - would reduce the initial database size by at least half, I'm guessing. Would be a fun project; if I had all the time in the world I'd probably try to launch it.
But the forum does not store images. That is why this aspect does not even arise in this matter.
The issue will be navigation time and content updating. Making a post and it only being available 10 minutes later for everyone, I don't think is ideal.