Different people will be faced with different needs.
By virtue of where some live and the laws in certain countries, unless it is your own military, you are largely prepping for a knife fight or perhaps a shotgun fight.
A nuclear event has need for tactics as well though, that will in part be determined by remaining population and livable land mass in addition to preps.
Perhaps in the UK a one man army is all you will need. It is different here.
I have a 78 year old horse friend over there in England, that beat three young “hoodlums” who tried to rob her, into submission with her walking cane. The Bobbies thought it quite humorous when they showed up and she had them sitting on the ground cross legged, hands behind their heads, against a building, keeping them from escaping with the threat of her cane.
On the other side of the pond, I see a need for battle tactics in my group because of the difference in the ability of populations to migrate (we are not on an island and border Mexico with their drug cartels) and the types of weapons available.
Our events will not be fought with shotguns and knives and it won’t matter if it comes in the form of a nuclear holocaust or an economic collapse.
For the preppers here, it will be a necessity because a good sniper (we have a couple of those in our group) can take you out with a rifle before the sound of the shot even gets to you and long before you get anywhere near your intended target. Shoot, shovel and shut-up.
Yep, it is a game. A deadly serious one which if you do not learn how to play well and learn from your mistakes before the dice start rolling, you will be out of the running. Learning on the fly is a fools errand. Yes, murphy's law is always in effect. But, the more experiences you have, the better you can make decisions that might mitigate the effects.
Eg. Your gun jams right when you need it most. If you have never had that happen because you didn't practice enough time to have it happen, will you be able to clear it?
What some call “games” I call the process of learning survival skills. If you choose not to develop those or see no necessity for those so-called games, that is your choice, but, don’t belittle those of us who find a dress rehearsal for a real event, to be a pre-requisite to successful survival.