The stroke order of the word "must"

I think a university calligraphy professor said that "must" has nothing to do with "heart", so it is wrong to form it according to heart+phlegm, and this writing is also wrong. The correct spelling is to write "here" first, then "vertical hook", a little above, a little to the left, and finally a little to the right. These can be seen from the strokes of ancient calligraphy, what to write first and then what to write.