"No you can't do that. Here's other ways to help with space constraints." isn't a valid answer to the question? Would you prefer people lie about being able to puts apps on an SD card - tell you it can be done when it in fact can't?
Again, it's not the answer you want to hear, but it
is an answer. How else would you increase your free space on a built-in drive than deleting files or using Disk Cleanup?
I agree the "adding memory" suggestion is irrelevant. Memory has nothing to do with disk space. Maybe, since a lot of people do confuse RAM and storage, he was covering all the bases, but I agree it was off the mark.
But prior to that, the answer was correct.
My objection here is simply that it's rather rude to call someone stupid because they gave an answer you're not satisfied with. Whether it's a good answer or not, he at least tried to help. Frustration doesn't excuse a lack of courtesy. All it does is make
people less interested in helping you next time.