This thread is pedantic. (Google it)
Obscure words are fine for masters and doctoral theses, specialized technical writing, and specific legal terms.
As a person who has handled analyses of millions of dollars worth of assets, the key in writing an understandable report is to write at a 12 year old level. Words of 3 syllables or less unless absolutely necessary. Words that clearly state the findings and meanings you are trying to convey.
The extreme use of obscure legal terms, for example, has led to the requirement that contracts be written in common language.
The change in requirements do not reflect a ‘dumbing down’ of the test. Rather a reflection of what an individual will typically use in 98% of their college life.
Some would call that obtuse.
“This is the type of arrant pedantry up with which I will not put!” - attributed to Winston Churchill
Arrant pedantry, up with which I shall not put!
Now you’re just being abstruse.