What if it is computer graphics, but you heard/read that game companies are notorious for paying very low salaries? (Living paycheck to paycheck is not fun!) What if there are no junior positions in your area of interest? What if the CG jobs (at film companies) who pay reasonable salaries are concentrated on a few locations globally? What if you cannot relocate?

To cut a long story short: you might have to choose between the second best or "less painful" option sometimes. This is because of circumstances (effectively) outside your control.

My second-best option would be, C++ developer, but not many C++ jobs out there. (I actually really like C++.) HFT? Well, it depends, many HFT companies use Java instead. Embedded systems? Well, it is mostly C. C++ jobs are out there, sure, but they are not so frequently available compared to JS or Java jobs.

I hate having such niche interests, but I can't live without them. So I at least practice them in my spare time.