Its a self fulfilling disaster. The vast majority of developers learn their skills in a company. Companies don't want to pay for documentation. So developers don't learn to properly document.

When I work with a client that doesn't have a constraining standard for their product, they never ever want to pay for documentation.

When I work with a client that has to work with constraining standards, they want the strict minimum that will get them their cert.

Edit : forgot to add my closing point.

Having a good documentation will make coding a lot more efficient and easy and usually decent.