How do I include a non-technical critique or line of thought in a technical doctoral thesis without being off topic? Here is more context:

I understand that I have to stick to the point and so on, but I'm not asking if you think it's a good idea or not, so I beg you to spare me the lecture. I would like your advice to do it in the best way possible.
My research domain is software engineering.
The reason for wanting to include a non-technical passage is that  I want to point to other fields in which nature-based design (i.e. biomimicry) has led researchers astray such as architecture for example. Another subject I want to approach is patent law, so I would ask the same question for that.

Of course, the main thrust of my thesis is technical, but I firmly believe that some information about the surroundings of the subject is important, because the subject of my thesis is about the use of improper methodology in a subfield of computational sciences, so it does fall under the category of meta-methodology.
Thank you all for your input. It is much appreciated.
An excellent doctoral thesis in software engineering must have passages of non-technical thought, the more the better. Such passages make the work accessible. Of course, technical aspects must appear to. The non-technical passages complement the technical aspects, the former provides the story of how the latter came to be.

To explicitly answer your question: Non-technical parts aren't off-topic, include them wherever necessary, just like technical parts, I don't see a need to explicitly distinguish between the two, the author will know.