I interpret this Canadian text to mean: you are cleared for an approach of whatever type. You can descend at pilots' discretion so as to safely establish on the approach at a safe altitude. You are responsible for determining what that is. The criteria are written down.
No where in that text are you operating at an ATC cleared altitude (below your cruise level) on a commanded heading to establish on the final track. It's not quite apples & apples.
However, your example might be concentrating on the 'MSA' element of the text. If so I defer to you.