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.
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.