The WSJ has had a... unique... opinion section long before clicks were an issue. I think their purpose is, as with a lot of opinion writing, to make the readers feel good (smart, righteous, wise, important, justified, etc). But the WSJ has a subscriber base unusually dedicated to a) getting money, and b) keeping it. And a lot of Wall Street as an entity is less focused on value creation than cash extraction, which is a particular mindset. So the opinion section is going to reflect what's important to the key audiences.
My understanding is that pre-Murdoch, the news and opinion sides were thoroughly separate. Hopefully that isn't getting lost.