If they ask for something outside WCAG, I say no, that doesn't meet the standards required and do not ask if they want to respect the standard.
I learned to stop asking permission to use my professional judgement when I went to a boss with an active password/login leak that was risking an important dataset and his response was "if it hasn't leaked, let's just not worry about it and leave it"
What do you know, the next morning he was informed of a leak and I was approved to fix the issue. The leak was not real, of course.
It is not necessarily relevant if you only work with private individuals and entities.
But it also isn't that much of a burden. So my take on it is just do it and then it never is a problem.
What are you meant to do when you have an existing site with a brand that has inaccessible colors for the headings, buttons, links, backgrounds, text etc.? Sometimes it's not as easy as making a few colors darker/lighter, and it's a huge ask to get the client to modify their brand for this, as well as updating the styling code everywhere.
We were pretty large, big-name online merchandise retailer. Definitely put our heels to the fire on giving the frontend a design refresh.
Any and every good cause will attract a bunch of vultures, scammers and scavengers, including accessibility issues. But I'm not going to believe those who say that any company which isn't up to date on this will "get sued to oblivion". Not without examples that prove it.
With that said, I'm a strong supporter of Internet accessibility because there are no down-sides to it. It is essential to the people who need it, and at the same time it improves the experience of those who don't.
https://news.mobar.org/confronting-the-rise-in-ada-website-a...
Is there an of any company which was "sued into oblivion" there? The examples in your link of Netflix, Domino's and MIT are still alive and well.