[Avodah] Why so many details of tzora'as in the Torah?

[Marty Bluke]

R' Dov Kay asked:
<Why does the Torah shebichsav spend so much time spelling out the details
of tzora'as relative to other, more practically relevant areas of halacha
<(eg hilchos Shabbos)?

We can ask this about many things. For example the Torah describes in
excruciating detail the design of the mishkan and then repeats it for
the building of the mishkan. Considering that the whole mishkan is not
even l'doros there is a tremendous amount of the Torah Shebkisav
devoted to it. On the other hand take a mitzva we do every day,
tefillin, the Torah devotes basically 1 pasuk to it giving us no
details at all of what tefillin should be, look like, etc. These are
just 2 examples, there are many more. I would be interested to know if
any of the mefarshim had a principle explaining why certain mitzvos
the Torah goes into detail and why some not.