Strongly disagree. When it is honest, I find calling something "easy" is a great way to set the bar for the reader.
Regardless of the subject, If I am blown away by something labelled as "easy", it is most likely one of these two:
1) I thought I got it but I didn't
2) I don't have enough background to understand it
"This is easy" is the nice, red sign that is basically telling me "don't go further until you understood this" - and I'm quite happy to stumble upon it. Yeah, it usually means more research and thinking, but it is the only way for you to know that you actually mastered the topic, when it will eventually look, well, kinda easy indeed.
Regardless of the subject, If I am blown away by something labelled as "easy", it is most likely one of these two:
1) I thought I got it but I didn't 2) I don't have enough background to understand it
"This is easy" is the nice, red sign that is basically telling me "don't go further until you understood this" - and I'm quite happy to stumble upon it. Yeah, it usually means more research and thinking, but it is the only way for you to know that you actually mastered the topic, when it will eventually look, well, kinda easy indeed.