Even then it’s still a quick mistake to make. If I’m not paying attention I could easily make a mistake like this, because I’m used to reading things left to right.

I would love to watch people who say that diagram a sentence, per 10th grade English class rules.

(For the record, PEMDAS).

It's also not that hard to just write it in a far less confusing way in many cases.

In this simple case, 4 x 2 + 2 or 2 x 4 + 2 would have been superior choices because both people reading left to right and people following pemdas correctly would get it right, and only people mis-remembering pemdas would be confused.