I see the basics he is talking about in the beginning of most Aikido techniques. The only thing I do not see is proper distancing. Is it because the system is a for law enforcement officers?
No, it's because of the type of attack he's talking about. These are surprise
attacks, from a realistic distance.
What you call "proper distancing" is dojo stuff for (basic) training purposes. If you have only ever trained from outside touching distance, you have never done any realistic self defence training.
If you always have the sort of control over distance that is possible in a dojo, you never need to get involved in unarmed combat.
But actually, nobody will ever attack you with a stepping punch. Firstly, because unless you've trained for years, you can't do one properly (and I include every aikidoka I've ever met, of any rank, who hasn't trained in karate or similar in that statement). Secondly, it's really a quite weak punch. Try doing it against a punching bag, then compare it with a simple reverse punch. There is no comparison.