You still need some sort of verification, even for something as simple as ensuring that images have alt-text. Maybe you missed some images that are dynamically

You still need some sort of verification, even for something as simple as ensuring that images have alt-text. Maybe you missed some images that are dynamically generated in a way you forgot about, or have a typo in the tag. If screen readers aren't compliant to the standard, then you need to test against as many screen readers as possible to ensure that your site is accessible. Users want a site that works, not a site that complies to an unimplemented standard.