[zdkl]

I recognise the truth in what you say. We both apparently live in areas where we can afford to ring up the repair guy for fixing or replacemement.

Why you assume that is universally true is beyond me though. How do you expect societies that are incapable of adequately maintaining roads or developing safe architecture to house their population to sprout the mentality and savoir-faire for complex operations?

For sure my argument is not universal either, but I believe you transpose properties you are familiar with to a world you are not.