Is this FOMO or passion? How to fix it?

I am a software engineer with a Ph.D. in CS and am mainly working on ML infrastructure and performance optimization of model training. Generally speaking, my personal passion and interest lies at the intersection of linux kernel and performance optimization (think of the area around eBPF and the work that Brendan Gregg does). Therefore, naturally I spent most of time on reading and think about linux kernel and performance in general. However, I have this habit that every time I see a topic that don't know much about have a FOMO-like feeling and start reading about it. This takes a short period of time and then I jump to the next topic. The result is, I read about a wide range of topics and but I don't much about any of them to have an opinion. To give a concrete example, while I know a fair amount of ML frameworks and can implement basic ML pipelines and do performance optimizations (as part of my job), still when I see advance topics like transformers or newer model architectures, I feel terrified that I don't know about them and have an urgent feeling that I have to learn. Learning means spending time, which I don't have for it as I need to do my job as well as read other topics that can help me with my job. At this point this habit, which I don't know whether it's stemming from FOMO or passion, is ruining my confidence and my mental health and I don't know how to fix it. What is your advice here? should I keep reading about whatever topic I come across or focus on the area that It truly love?