If you have to ask questions like this, you haven’t been working in the industry long enough.
To be jaded.
It's merely a jab at the way we tend to overcomplicate solutions to simple problems. I think.
Is snarkily telling someone they're not good enough helpful?
Seems like a moment where you could share what you know (as someone, presumably, has been in the industry long enough) and help someone.
(FWIW it sounds like a decent question to me: but then again undoubtedly I have not been in the industry long enough!)
The answer is: it’s in our nature to make simple things difficult.
It shows more maturity if you just accept people do stupid things without trying to pry a rationale out of them IMO.
And thus avoid all the problems mentioned above.