Underlining this discussion is IMO the unfortunate tendency for flight training to generate “rules” that must be mindlessly followed. Beacon lights don’t stop people from walking into props, the pilot visually clearing the area before turning the key is what does.
I think it is better for students to understand not just the “how” but the “why”. TOO gives a perfect example where 2 different procedures are required due to aircraft differences. There is no problem here and if the student is unable to figure out what to do with the lights then I would suggest they are not fit to be pilots.