I agree but this is a surface level issue impacting the very beginner phase only. Once you get familiar with the vocabulary, the hard stuff will be the actual material, understanding the thing itself, not its description. This differentiates fields that have an actual subject matter from fields that are essentially terminology and categorizations all the way through, a self-referential map with no territory.

In math/physics/engineering the terminology is unfamiliar at first but very precise and hence learnable. The vast majority of STEM textbooks (at least from good US university publishers) make their best effort in presenting the material understandably without any intentional obscurantism or additional fanciness. Academic joirnal/conference papers do sometimes intentionally confuse to game the publication metrics but intro materials are an earnest effort at educating. The subject matter has some inherent complexity, there's no need to prop it up artificially for prestige (that happens more in other fields that are insecure about their level of inherent complexity).

Oh definitely! Eventually you've spent so much time that the thetas and lambdas and Lorentzes and whatever become your close intimate friends. I've most recently experienced this with learning piano and how an ocean of white and black keys all developed these individual "identities." Like, "ah yes, <looks at A4> I won't forget you. We've had so many dramatic moments before, and remember that time I kept showing up at your neighbour's house instead?" ...Okay maybe I'm just weird.