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Latin is what almost the entire Western academic literature prior to the 19th century was written in. You may or may not know this, but Google Translate didn't exist. So, it was essential to anyone undertaking academic studies at the time (in the West) to read Latin, though not to write it. Nowadays English holds that position, despite Google Translate.

Yes, because learning Latin - as a written language - will put your vocabulary far ahead of those who don't. My high school had a general elective focused just on learning to use Greek and Latin to enhance your vocabulary, it was essentially a free SAT prep course for the language section.

So many terms can be quickly understood if you understand Latin prefixes and suffixes, and the better you understand Latin the better you'll understand its use in any of the modern Western languages.

I suspect the answer is "both".

Bingo.