The people filing civil lawsuits generally are disabled, since they would be the only ones that could. A civil suit doesn't just get thrown out because you passed WCAG.
Typically suits that do that without warnings or asking things to be changed are thrown out immediately. The plaintiff usually has to show that they tried getting it changed through normal channels before filing a lawsuit.
The racket goes like this - a lawyer firm, specialized in this type of "work", finds a token blind person and sends you a letter to the tune of "On date such and such, our client visited your site and it wasn't accessible. Based on such and such precedent, we're not required to give you advance notice and can to sue you for $100K. However, we're reasonable people and we're willing to settle out of court for $10K, as long as you promise to fix your site under the supervision of an accessibility expert pointed by us".
For small companies, even if you're in the right, the only thing that makes sense is to settle. Going to court is way too risky.
It doesn't, but it's evidence in your favor, much like meeting the physical accessibility requirements would be. If there's still a legitimate problem, of course you'd have to address it.
