Modulær additiv arkitkektur/Modular additive architecture

What is the most important part of architecture? Is it form?

Throghout the history of architecture there has always been an obsession with form. But this obsession has always confused me; WHO did ever prove that a beautiful form to the eye also creates eminent spaces for the body??
Almost every realised, architectural project today  has a conceptual form, an intuitive form, maybe even a beautiful and playful form - but does the form contain beautiful spaces? - inhabitable spaces? - embodying spaces? - comfortable spaces?
What is a form but an empty shell?
How does a form communicate with the entire body?
Form is visual communication, only throught detailing and scaling can the form ever be architectural!

This is also my reason for having trouble with modular additive architecture - as for example the Espansiva Module by Jørn Utzon. The module develops as a form which is has to be easily additive, and the danger of this is that the final building often becomes a formstudy of how to add these module intuitively, functionally and formingly.
Only late in the process is the final building fittet into the given context.

But my proposition is that architecture is supposed to develop from and interrelation between the context, the function and - most importingly - the body of the user. There must be a way in which modular additive architecture can coexist with these terms, as I accept and believe that there is a need for the economically solution of the additive module, but I have not yet found it.

The most important part of architecture must be, and always will be, the body.