Thanks for coming here and sharing the wisdom of your experience with us. Your method would indeed be ideal, but it’s either impractical, or impossible, given how I’ve seen airlines do it nowadays.
As an example, at my current airline, we deice with both engines running, and (usually) well away from the gate. If and when required, a crewmember will inspect the wing, but opening a door to inspect the tail is out of the question under normal circumstances.