There is no doubt that quality posts matters especially when one is just starting,it is the quality of your post that will make people know you very much.If you are very good at making posts,then you must learn how to add quality to your posts because you can be making posts for a long period of time,and then you won't see merit in that post you are making.
Remember,merit is the reward for the quality of posts you make,so therefore,while making posts,also try to improve the quality,so as to get the reward,which is the merit.