Very true....my point is show me where a metal tipped nose cone is really needed for HP...again I say jokingly no doubt...are you afraid it;s going to melt as it is moving so fast...Plenty of folks launch HP successfully without using metal tipped nose cones....and yes, as I said before....just pray you have no recovery problems as you can tell the lawyers why you needed to tip the nose cone with metal when they pull it out of a structure or a car....hopefully no people around.
And if a plastic or fiber does make a ballistic rentry at least you can say you used some common sense and followed the safety code to the best of your ability. In my opinion, that is not the case when you build the cone with metal. HP safety code says what I inserted above...copied it from their website. You can interpret it as you like but seems very reckless to me....
But what do I know.
Here are several reasons for it.
one reason is that It is difficult to almost impossible on filament wound composite nose cones to fully wind the fiber glass, or carbon fiber to a tip of the correct shape or to get it to even wind correctly on the mandrel. So to create a durable easily formed tip that will mount on a shoulered ledge and fasten to the cured nose, that will last and not break the first time the tip touches the ground. Its also similar in strength to filament wound products of fiberglass and carbon fiber. composite tips tends to be slightly cheaper, but the tip can be a bit more brittle and break easily so therefore aluminum is used.
It also acts as a nose weight helping stability in most cases moving the center of gravity forward.
It can be on super sonic flights an ablative tip that will keep shape while forces against the rocket can and gave been witnessed on some composite and plastics to melt or errode from heat if friction
aluminum tips also allow you to put an eye bolt at the very top of the nosecone. This provides you with additional space for parachutes and shock cords as you can use it for head end dual deployment or for added space for rockets flying extra long motors that need added space for parachutes and shock cord with other material you couldnt do that as others are more prone to break. This could cause loss of main deployment.
These are just a few reasons you can accept that there are reasons for it or not.. its as you pointed out your opinion. The rules of NAR high power and TRA both allow it. If they didnt you'd see a rule against it specifically. Each rocket has its need. I have one that uses metal fins and tip. It will push limits that fin flutter, or heat could create an issue while under extreme boost on its way to 40k ft. The nose cone metal tip is for attachment of the tracking system bay.
There are reasons and its not against the high power code. Your interpretation and opinion is where you are seeing it from.