It can be a career path; whether it’s a good one is another matter. Much of it is what you make of it. I worked on the hardware and integrated systems QA side for a few years after spending a bit over 5 years doing work other than QA.
I would say that QA can be more interesting and occasionally challenging than some other facets of engineering and technology.
Conclusion: Wis good for your career if you want to be a Quality analyst. Just remember one thing it is more than finding bugs and errors.