This speaks to the point in the article "The real problem is that C++ is neither easy nor loved," which they offset with "The language may be hard. But it's also worth it."

The problem is that there's a law of diminishing returns to compensation. If you can work with a tool you like that helps you meet milestones and general expectations for $X00k generally leading to pleasant days, or can work with a tool that makes your life harder and leads to higher stress fewer pleasant days for $2X00k... sure there's going to be people who take the extra money. But there's also going to be people who say to themselves "yeah, it turns out I'm plenty well compensated at $X00k I'll take the extra quality of life."

"Worth it" is a value judgment. How many people managing the financial firms decided it was worth it to invest in C++?