My thesis supervisor used excessively flowery language like that in papers, and I had to have a few tugs with him over needless verbosity all while learning to write a paper for the first time. I think there's a subconscious "look at how wise I am" whiff that comes off this type of writing. And sure, yes, impressive, but let's leave creative writing to creative writers. As a scientist, you should instead be focusing on communicating a (probably complex enough) idea as clearly and as simply as you possibly can - just not any simpler.
By the time I wrote my thesis, I was far more assertive in politely declining many of his edits.
By the time I wrote my thesis, I was far more assertive in politely declining many of his edits.