Scientific articles use a lot of this type of writing to try and be like "hey guys this is really important and no one else has done it yet"/"hey this is important and we did it better than those other guys". "novel" as in new was extremely prominent for a while.

Saying that the research you're doing is important, unique, new, faster/better is needed to make people agree to fund or publish your research. Using more "complex" words allow doing so with a chance of not sounding like every other paper/article but then people shifted the goalposts so now you have to sound like that to even be considered mediocre and not using that wording can make you be considered as "less" therefore less able to get funding or publish.

E:biomedical areas but other scientific disciplines too