Ok I'll agree with you, I was over exaggerating saying it was total BS.

But every thing you just pointed out was clearly stated in my models Manuals. Step by step instructions and very simple to follow.

Total BS, no your right. But it's not necessary if you take your time and are thorough.

If you practice trimming a plane in the air, practice landing in windy conditions with a large cross section of models, you will be prepared, if your experience is anything like mine.