I am sympathetic to what you are saying, but as far as using animation to attract business, you are in the lowest percentage of people that would make a purchase (as well as being on HN, you are probably far below a tenth of a percent for a customer). I also try to prevent large carousels and animations on websites for accessibility, but when it comes to those who convert to customers, the animations are going to win out by a ton. I know you know this, too, but I'm just saying it so you know you're heard, but businesses need to sell.
The number of people that are able to handle accessibility, while also being capable of creating a captivating presentation to drive sales, is extremely low. This isn't an attack on anyone, I wish things were more black and white, but until those with accessibility needs are driving revenue more you are at the mercy of the government and ADA (if you're in the US or anywhere else similar concerns are legal).