While I am carrying out research or learning something in my field, I often find some other resources that are relevant to my domain and could help my understanding. Sometimes, while learning, I find myself going down a rabbit hole of these resources for hours, and come out feeling overwhelmed that there is so much to learn, and I know so little.
It could be a research paper that looks interesting, a textbook that might prove useful later, software applicable to my field, a simple side project, a course, articles etc. I make a list of these things (and it is endless) and tell myself that I will come back to it sometime later. But the reality is that there is simply too much to learn and not enough time.
Even if I work like a machine (which is far removed from my actual capability), I will not be able to learn everything in my field. I know that learning All The Knowledge In The World is impossible, but what about knowledge in my own field of interest, which is rather niche?
How do I come to terms with the fact that I will not be able to learn everything in my research area?
Do veteran researchers also feel this way, or does years of experience give them confidence in their level of knowledge?