I would say that it is like being a writer in that you have to know your audience. I would write much differently for an article aimed at teenage boys, than if I was writing for middle aged women. If you’ve coached both genders long enough you know that you can, and in some cases have to, approach each quite a bit differently. You need to be able to customize your coaching to the athlete. For instance, on this message board I would think it would be fine to expound on topics, as I would hope there are some folks here with some solid experience and science in their background. Charlie Francis has a very fine book from the early '90s that is approx 200 pgs long, and a pdf document available on this very site copyrighted in 2008 that is 270 pgs long…both on the sole topic of sprinting. I would recommend both as very fine sources of information on our sport. The “Key Elements” document available on this site is very good and thorough.
When working with athletes you will find the same thing. There will be some kids and young adults who you can talk to like they are “coaches in training”, and there will be some kids and young adults who will not understand what you mean from the simplest of instructions. If you have an young adult athlete (who has experienced university level education) who does not know what the nervous system is or does, even though they have been taught it in school since Jr. High health class, then that athlete probably won’t be able to handle much detail. I have had an athlete who consistently couldn’t remember what foot they put forward when they began their jump run up. That kid needed the kiss method. Every once in a while you’ll get a physically talented kid who will want to know the ins and outs of the event or sport, and those are the ones that can be really special. It’s like being lucky enough to coach a Peyton Manning or Tom Brady versus being unlucky enough to coach a Tony Couch or a Ryan Leaf. All are physically gifted enough to be QBs in the league, but two understand to the fullest extent, while the other two just don’t understand.
It is all relative. Some you will very much have to use the kiss method. While others can thrive with more details given. Through experience you will be able to customize your coaching to the athlete. As a coach you should aspire to fully understand your sport then be able to customize your coaching, and not to apply the kiss method to your own understanding of the sport.