Sorry, but you completely misunderstand the point. The point is that, in the real world, there are subtle variations outside of your control and de facto stand

Sorry, but you completely misunderstand the point. The point is that, in the real world, there are subtle variations outside of your control and de facto standards arise independently and have slight differences before official standardization can occur because of the need to ship product. Attempting to stomp your foot to demand others conform to your way is unrealistic, unreasonable, and childish. Utility is had in working-around quirky differences for maximum practical compatibility while persuasively encouraging projects with minor incompatibilities to adopt conforming behavior.