Economy of words makes your message stronger. Using too many that are extraneous distract and dilute it. This is why adverbs, adjectives, and prepositional phrases often add extra bulk that should be trimmed, just like the fat on a brisket.
Flowery writing or over-writing simply doesn’t work. Do you want your reader to get your message or get lost in a tangle of words? [Please note this is not to be confused with saying something so beautifully that your reader (most likely another writer) pauses to admire how well you expressed a thought or rendered a description.]
Being redundant is ever worse, and a special case of over-writing. As a reader, I feel somewhat insulted, like the author thought I wasn’t smart enough to catch it the first time. Doing so within the same sentence or paragraph is even worse. If this is part of your natural style, don’t let it hamper your creativity; worry about it when you start to edit.