E.g. take describe-function: diff

The first line:

diff is an autoloaded interactive compiled Lisp function in ‘diff.el’.

The line describes what this entity is and where it is defined. If I want to look it up, then I have to press TAB to go to the link and then RET.

Since RET does not do anything useful on help text anyway, it's more convenient if RET goes to the source when pressed anywhere on the opening text describing the entity, without having to press TAB first.