Again, it's about protecting both parties and being detail-oriented. It starts with the paperwork and processes. If they just want a car wash, then go to a car wash. There's a reason why people pay more elsewhere.
Not a game, just trying to meet expectations with clarity and have details.
I've been in detailing for going on 38 years. I grew up in a family that owned three dealerships and a used car lot; worked in a body shop and nearly every aspect, from sales to finance. The only thing I've not done is engine work. I've never had an accident with a vehicle, such as ripping doors off or wrecking one. I attribute that to solid standard operating procedures. (SOPs)
I've never ruined or damaged any electronics and paint burn, one time, many many years ago, and i was a re-painted panel and my TC's outline I'm not responsible. Customers sign off on it, and just like with the purchase of a used vehicle as-is or the installation of any mods, they enter that at their own risk. That's not to say one can excuse any and all damages, but there is a legality that's at play when it comes to negligence.
Accidents are defined as unfortunate happenings with unintentionally caused circumstances. Negligence is the lack of ordinary care, skill, or management of a process or property. That's why your very first point about people just wanting their cars "cleaned up" is irrelevant. The detailing process is about ensuring that we manage and exhibit responsibility around reasonable and professional care and adhere to strict and measured processes. When those professional documented processes are ignored or skipped is when the liability window opens up wide.