why should i even make a posts to get access to put links?
You were already told it is to prevent spam. We used to get lots of spammers that just join and immediately paste a spam link.
By forcing spammers to post multiple times before being able to link something we can usually ban them before they get to post their spam. Many times they give up the first time they see that message.
If you really want to share a link here for things like bans then just put a space in www so it doesn't get detected as a link.