Alkhemia Studio lol thanks...

A few important reasons: 1. There are about 1 billion people across the world with some form of disability. So building an inaccessible experience means you'll miss out on those users. Blind people want to order pizza and go on vacation too! 2. In some countries, like the United States, it's against the law to build inaccessible applications. You will get sued and many large companies have been. 3. Adding in good accessibility usually translates into components that are easier for everyone to use. For instance, the trackpad on my laptop literally broke this morning so I'm doing a bunch of stuff using the keyboard today. I'm *very* thankful that apps like gmail and tweetdeck have good built-in keyboard support 4. It's a fun engineering problem to work on. I find that most folks who don't care about accessibility don't understand how it works. Once you have the basics down, it's quite fun adding in good semantics and verifying your components work well with a screen reader. I get a lot of personal satisfaction out of knowing I built a component that looks great, AND is highly usable.

god forbid anyone with a disability wants to use the internet

Exactly! It also also allows us to answer the WHY question. Just imagine that the labels in your example where not visible. We would just see a bunch of input fields without knowing WHY they're there ... A simple script could alert us the contents of the label associated with the input ...