Why don't all dojo have fundamental stance/movement basics/warmups?

In Aikido they do something referred to as a walking kata. It teaches footwork, posture and body movement. In karate, my system in particular, does not focus directly on such fundamentals. It seems to promote all the proper fundamental principles of martial systems as given in the book of martial power and considering the importance of such things in the overall scheme of martial arts, combative arts and/or self-defense I wonder why it does not exist.

Take a look at the post over at Patrick Parker's blog, "Mokuren Dojo." 

http://www.mokurendojo.com/2013/08/the-walk-2-wakiashi.html

When I viewed his video I began to wonder why this is not, in some form, a part of the fundamental basics, i.e. in Isshinryu they use the upper and lower basic techniques as a warm-up/training for those basic techniques that are supposed to train a karate-ka in things like proper stances, transitions when done in a movement or walking manner, and kamae, etc. I just wonder since things like posture, body alignment and movement, etc. are so important that karate communities/dojo's don't focus on the assumption, movement and transitional aspects of just the stances along with incorporation of the fundamental principles before going into basics such as hand and foot techniques. 

Consider this theory, the assumption (although very brief in delivery of combinations, etc. and often on the move type stances) of stance or kamae while applying various techniques seems to detract from the importance of said stances. I feel that the stance and the Earth contribute a good deal to the transference of power to the adversary. 

Then I think of those maneuvers that require us to move, out of the way or off center of the adversary, while applying appropriate principles/techniques are not given more due diligence at the novice levels. I watch the walk, Aiki Tai Sabaki in the video, and can see how that would be of benefit in laying out a solid foundation for the art as well as for self-defense principles. Watching this video shows me movement beyond what most karate dojo practice in basics, i.e. the forward and backward straight line model. Is this why many karate-ka get stuck in that straight line model vs. something more adaptable to self-defense?

In my later years as a teacher I did move toward adaptation of stances, movement, etc. without hand techniques to keep the novices focus on proper stances with applied principles of martial systems because in my previous years observed many students lose site of proper stances, etc. and having to struggle with it later when changes are much harder. 

Some will speak up and say, that is what the basics are for as well as the kata but I find that so many are caught up in other aspects, i.e. applying hand and foot techniques, that they lose site of this part and then struggle longer to gain a modicum of proficiency. Over taxing the mind seems counter productive to me and when someone is learning the martial arts as a novice, i.e. absolutely no previous experience at all, then it seems to end up confusing or more difficult then it has to be. I attribute this to expediency vs. slow deliberate progress. 

It is great when you finally get to the "more fun stuff" in martial arts but without a solid foundation in principles/techniques you end up with useless stuff that may look good but may not work especially in the fight. 

What do you think?