The problem with this kind of prescriptive approach is that although it may work for some people who need to do something very regimented, very often playing the saxophone is not like that and what works best for a lot of people is finding what works for them.
It may or may not take a little longer but I find it a more creative approach than saying what mouthpiece pitch you should get (I get something totally different to the prescribed pitch) or where to put their lips by placing a piece of card under the reed and drawing a pencil line.
I have found that taking in too much mouthpiece can be way more of a problem taking in too little. Over the years I have found what works best for me most of the time is to play right at the tip. It does not cause the read to bend too much or the sound to get stuffy but it does allow a lot more control over the reed and so flexibility of tone and pitch. Although a lot might depend on the curve of the facing.
Maybe it is soft reeds in general that may bend more, but that is partly to do with embouchure control and possibly I think the nature of softer reeds, maybe we just accept they don't last as long as harder reeds but that is small price to pay for the advantages.