I am having a hard time understanding why I have to have a certain amount of points to join a group.
It is part of a design to keep the crazies from taking over the site. Most persons with nefarious intent dont' have the patience to accumulate the points needed to act like an ass.
They also require the newest persons to have their posts approved by members with a hi9gher point accumulation, which is another way the site is monitored by its own users.
Hello and welcome, enjoy the site.
Some groups feel open to trolling, they set a certain value in points, so that only members who have proved that they are trustworthy can join. That is the main reason for the points system, it gives the site a chance to block and weed out, hackers, trolls, dealers and fakes etc. before they can do real damage. Some groups are more paranoid than others, sometimes with good reason (If they have, say, political content. ), sometimes not. But points come quickly if you take part.