That's Ok for those who have done it many times over and over. But a lot of people are looking for a simple way they can be sure works. Now, I've done it many times with mine and have written down the degree location for each and every intake and exhaust valve for all cylinders and will continue to use my system because I know it works for me and is accurate, and I even have tons of tolerance on both sides if I should miss my exact degree, but I don't. It's written down and I follow it. I also know that I don't miss any cylinder, and it is 1/4 turn for each.
It makes me feel good knowing each one is correct. I figure there are probably other things I'm not aware of, so I try to eliminate every error that I can.
Yes, I know a lot of people that use the method each of you are talking about, and it must work. And I'm not saying it's wrong, I'm just not as comfortable using it. It's easy to get confused. Well, it's easy for me anyway.