Example: YouTube figured out that many videos were being uploaded upside down from mobile phones because some left handed person in the company ran into it.
For example, every website with tiny font and low contrast text (like this one!). Older people tend to have much worse eyesight, and so suffer much more from these problems, but are missing from many teams.
For example, in some countries, the harder and more tiresome a process is, the higher the odds that someone will bribe their way past it. The more inefficient a process is, the more money they make. They also happen to be highly underpaid (similar to American waiters) and rely on "tips" to make a living.
Over and over again, I see some first world company offering them an excellent enterprise solution and not understanding why it hasn't been adopted.
The pre-90s IBM was the epitome of a non-diverse and uniform work-environment. The latter is to be taken quite literally, these were people wearing uniform suits and ties and singing company songs: https://www.youtube.com/watch?v=VyQEbLx6AEY
Apple on the other hand was the prototypical scrappy startup made up of a ragtag bunch of hippies.
What is so terrible about having to work with someone who might be different than you?