Only if you don't take into account opportunity cost.
You assume here that they've actively worked to change default behavior, but it is probably a zero-work-required by product of the widget they used (that gives them other capabilities thet do want) and to (a) revert to plain HTML textareas would remove this, (b) to add the default behavior to their widget would take extra effort.
You assume here that they've actively worked to change default behavior, but it is probably a zero-work-required by product of the widget they used (that gives them other capabilities thet do want) and to (a) revert to plain HTML textareas would remove this, (b) to add the default behavior to their widget would take extra effort.