Yes I agree with and it has been mentioned before, right from the day it happened in fact. But folks are all too busy playing the 'blame the Thai' game to take any notice.
If you watch the video in the link at 1:12, it is quite clear that the collapse started at the top of the building, just as you have suggested.
https://edition.cnn.com/2025/03/28/world/video/bangkok-building-collapse-myanmar-earthquake-digvid