[nirkalimi]

I think context matters here. Let's take two different use cases as examples:

Case A: The student has a genuine interest in the material. The student wants to be successful, and has worked tirelessly to configure and/or understand a given problem or task. The last thing the student in Case A needs to hear is "It's easy". Obviously the problem, to said student, is not easy. This can hurt overall student moral.

Case B: The student has not a complete devotee to the material. The student is "trying it out". The student thinks the material could be achieved without professional education or training. The student in Case B may need a bit of convincing. Telling that student that something like this is "easy" could be beneficial in this case. The student will believe that understanding of the material is at least achievable.