Sure, you get football players that comment on politics, movie stars that tell you how to run a business (or a state or a country for that matter).

No offense to Brian Eno, he's a pretty smart guy and has a lot of stuff to say that makes sense, also outside his domain. (and makes interesting music, 'the pearl' is my favorite music to code by).

But it doesn't generalize.

How are strong opinions outside of Brian Eno's domain?

They're not, read again.

It's just that it does not generalize from Brian Eno to 'leaders in other fields'.

There are people that it applies to and there are those that it definitely doesn't apply to, in other words, being a leader in one domain does not automatically qualify one for comments on other fields, that varies on a case-by-case basis.

Brian Eno is exactly the kind of person for who it does seem to work.