I think those are very nice results. I also think that you can get better results using RAW and an application like Lightroom BUT:
1) did you do any processing on these shots after downloading them? You can get better results from RAW + processing than you can from straight out of camera JPEG, and also than you can get from processed JPEGs but there will be less difference between the processed RAW and the processed JPEG than there is between the processed RAW and the straight OOC JPEG.
2) You have to learn what to do in processing. It takes time and practice. You can get better results with processed RAW but it may take you some time before you're happy with your results. Don't expect great results straight away. Getting great results still takes some work even after you've developed the necessary skills and it takes time and work to develop the necessary skills.
3) You can get more out of some images than others.
I find processing an enjoyable part of my photographic experience, but then I used to do my own B&W film developing and processing many years ago. I'd probably process RAW in Lightroom even if I didn't think I could get better results, just different results. If you enjoy processing your JPEGs to change what you get straight out of camera then you'll probably enjoy processing RAW files even more since you can do more with a RAW file. That can be enough reason to start since you're already spending time processing anyway.
If you don't like processing at all, then I'd say don't start if you're happy with what you're getting straight out of camera.
And if you just want better results and there's no other enticement to process RAW files, then the decision is harder. You're going to have to make an investment in time and effort in order to start getting good results, and then you also have to decide how much time you want to spend on each image/how good the result you're aiming for is. After trying it you may end up deciding that you can get better results but those results aren't worth the added effort to you.
Thee's been a series of ongoing processing challenges running here for some months now. The winner of the previous challenge posts a file for others to process, then picks the image he thinks is best and the person who contributed it hosts the next challenge. Take a look at those threads, take a look at what different people do with the same image. What some people do takes more time than what others do, and can take more skills than what others do, but it will give you a feel for what processing can do for, and sometimes to, an image. See if you find those threads interesting. If you do then it's worth giving processing a try yourself. If not, then forget it for now in my view. What you're doing right now looks very nice.
