You're...welcome? For what it's worth, mainstream American legal ethics try to strike a balance between candor and advocacy. It's actually not OK for lawyers to provide unabashed advocacy; lawyers are expected to also pay some regard to epistemic accuracy. We're not just hired mercenaries; we're also officers of the court.

In a world that was full of Bayesian Conspiracies, where people routinely teased out obscure scraps of information in the service of high-stakes, well-concealed plots, I would share your horror at what you describe as "disclosing personal information." Mathematically, you're obviously correct that when I say anything about my client(s) that translates as anything other than a polite shrug, it has the potential to give my clients' enemies valuable information. As a practical matter, though, the people I meet at dinner parties don't know or care about my clients. They can't be bothered to hack into my firm's database, download my list of clients, hire an investigator to put together dossiers on each client, and then cross-reference the dossier with my remarks to revise their probability estimate that a particular client is faking his injury. Even if someone chose to go to all that trouble, nobody would buy the resulting information -- the defense lawyers I negotiate with are mathematically illiterate. Finally, even if someone bought the resulting information, it's not clear what the defense lawyers would do if they could confidently upgrade their estimate of the chance that Bob was faking his injury from 30% up to 60% -- would they tail him with a surveillance crew? They do that anyway. Would they drive a hard bargain in settlement talks? They do that anyway. Civil legal defense tactics aren't especially sensitive to this kind of information.

All of which is to say that I take my duties to my clients very seriously, and I would never amuse myself at a cocktail party in ways that I thought had more than an infinitesimal chance of harming them. If you prefer your advocates to go beyond a principle of 'do no harm' and live by a principle of 'disclose no information', and you are willing to pay for the extra privacy, then more power to you -- but beware of lawyers who smoothly assure you that they would never disclose any client info under any circumstances. It's a promise that's easy to make and hard to verify.