this just seems to fall into the adage of the mechanics car is always the last to get fixed.
The last thing i want is to play with something i built. I would far rather play with someone else's, test it, use it, see how it works for the purpose it was manufactured. Whoever is using my products will certainly let me know how it performed.
seems just natural human curiosity to study what someone else has manufactured. Or it could be for any of the other reasons posted here. i guess it would be like a mercedes mechanic driving a bmw