It's not that it's the unwillingness to share, but more of the point, how you ask for it, and what skill you possess. If someone joins the server, watches people, doesn't set a lap, and then proceeds to beg for a setup, I won't give him it.
Same for drift, I'd say I hold my own drifting the XRT and LX6, but if some dingus is blocking, ramming others, ruining a twin, and then asks for a setup, I won't be giving it to him.
However, if someone is a good, clean racer (or drifter), and is polite, sure, why not.
I didn't realise this thread relates to drift. Nothing was said in OP's original thread starter, besides the word "clan", which could mean anything from drift clan, racing teams, cruising groups.
I think we are all entitled to hold our setups as private if we want to. It is a racing simulator after all, I treat all racing sims as a competitive league platform where setups are crucial in any form. Even on F1 2017. Eh. Then again... I doubt everyone is a purebred sim racer, maybe I'm just speaking for myself, lol
Cheers