I remember when I first got Allure (my first snake and I'd never touched a snake till the day he arrived). I sat there holding him for several minutes after unboxing because I knew I was supposed to wait to handle him from all the million beginner posts. I remember freaking out thinking I'd messed him up when the incurable urge to hold him got to strong and I cheated a little each day. Oh boy do they get on new people about that. I think all this wait two weeks crap is so stressful on new people. Why not let him settle in over night and then keep your handling sessions small until they get used to you. Stop if they stop eating. That two weeks no handling thing is way too hard when you're a beginner and want to spend all day watching your new obsession.
I've fed all my new arrivals on day one since I got my second snake. Only one that didn't eat on day one was my leopard girl, who took food a few days later (she also had just taken her only prekilled meal before being shipped to me and I was offering her first F/T).
I agree there is too much "you have to do it this way". I don't follow all of that stuff anymore. It was a good starting point and now I've moved on. I adjust for the individual snake and go by what I've gained so far. (still a newb though since I'm only around a year and half in)