From my experience with professional translators I would have to go out of my way to specify context if I wanted a good translation, because professional translators are too technologically illiterate to get stuff right.

Not to mention the difficulty in getting them to use Virtaal or PoEdit properly.

The problem you describe is one of incompetence. The professionals are not really professionals. And yet, someone is paying them as if they were. That is not the case everywhere, I assure you.

A little of anecdata: In Portugal, where foreign stuff is translated and subtitled, the quality of translations/subtitles in english language movies and series in very good. Or at least it used to be, I can't be sure anymore since I don't currently watch TV. I grew up used to reading good translations. Those translations taught me to understand and speak the English language when I was growing up, since age 5. I understand I might be a bit biased because of my personal experience.

My personal experience comes from Poland, where quality of movie translations has been basically a running joke throughout the years among the population that knows even a little bit of English. I do know personally a few professional translators - they're really smart and competent people, and most of them are even quite tech-savvy. Sadly, they don't get to translate movies.