Comment by ijidak

This exactly!

There are so many things that a human worker or coder has to do in a day and a lot of those things are non-core.

If someone is trying to be an expert on every minor task that comes across their desk, they were never doing it right.

An error page is a great example.

There is functionality that sets a company apart and then there are things that look the same across all products.

Error pages are not core IP.

At almost any company, I don't want my $200,000-300,000 a year developer mastering the HTML and CSS of an error page.