This. The wikipedia page for years seemed (not looking at it again, lol) to be written by people of the same ilk, who introduce a bunch of terminology without explaining what any of it means. When I read the wiki in 2020 it was literally impossible to understand, knowing already at the time how Bitcoin and a few other alt coins worked, as well as someone being into smart contracts well before even Bitcoin was created. And Ethereum is literally just a Bitcoin + smart contracts. There is no other core, fundamental concept to understand in it (until now: PoS). Also yes, as someone who has used hundreds of cryptocurrency products, this applies to basically anything related to cryptocurrency like you said.

One absolutely obnoxious practice is how they all make their own fancy names for millicoins microcoins, etc.