Stress can come in the form of long working hours, demanding clients, and tight deadlines, but that's true for any law firm. You may enjoy the work aspect, where you interact with customers and their creative ideas, discuss their inventions, and research the likelihood of successfully obtaining a patent. Although I don't have a comparable set of data on whether a certificate helps students obtain intellectual property works other than those related to patents, I think the same is true based on the experiences of former students. In addition, while there may be more positions available for those with technical experience, they are not usually those that a former art historian would like; after all, patent lawyers need to understand things like recombinant DNA or working with electrical circuits and not how to illustrate them.
There are an increasing number of students with scientific training who are now attending law school and passing patent law. I've seen many Loyola students get summer jobs and even permanent jobs without having to go through a patent ban.