As Dennis said, there is so much more. Being a guest, there is only so much you can see. You can only really monitor a very limited number of topics that may have shown up in your search(whatever search engine brought you here). There is so much more out there. Take for example if an engine has issues. You may see something about it, but you may only be getting just the tip of the iceberg. There could be a whole other bunch of topics that are being missed that are definitely pertinent to you.
Also, there are plenty of helpful members that always offer their advice, knowledge, and knowhow about virtually anything that there is inside the hobby. Take that and follow a few members here and there and you get a great picture into a whole new undiscovered world. If I wasn't following MartyE, I wouldn't have seen this topic as well as a whole host of others he has commented on. That is just one example, but there's so much more to be had.