To be honest-- I would not want to be doing any work where I had to climb on things, be on the floor, etc. in a kilt.  I would not find that at all comfortable. There is a reason I wear pants/trousers 99% of the time rather than a skirt or dress (weather aside), and it's because I have absolutely no desire to have to worry about what my clothing is doing or mess with it to keep myself covered when I want/need to be focused on doing something physical (the same reason I wear snug-fitting clothing in the gym rather than loose stuff).

I am imagining me trying to slide under a car on a creeper in a kilt, and having it get caught in the wheels, holding it down as I went in and out, having to be careful about how I held my legs under there, etc. Just another aspect of practicality to think about, from someone in a segment of the population who has been raised from a young age to think about coverage and movement in an un-bifurcated garment.