In reply to Felipe Lungov.

What you meant to say is "a few people don't understand how their website needs to be accessible". If a theme is downloaded 10k times from the .org repo, it could be seen by millions of people who visit the website using the theme. In the US, they have 54m people with disabilities, 18% of the population have some form of disability which requires a modification to the website. Would you like to annoy 18% of your website visitors?

It makes no difference to the website owner if they have accessibility features enabled in the theme but it will make a big difference to disabled visitors to their website! WordPress is the biggest cms in the world, it should be the leader in accessibility and making changes which impact the way we use the web. If accessibility wasn't added to the theme, website owners wouldn't do it, this would impact their visitors and potentially the website owners revenue.

Adding accessiblity to the theme helps the visitors who need the features but also helps the website owner by being able to allow those with disabilities to use their website, comfortably. There should be NO reason not to be totally onboard with this. It's a win win for everyone and the website owner doesn't need to do anything as the theme author is the one putting in the work to add these features.