It's true that improving your language can be a great way to express yourself better and converse about difficult topics. However, there are times when this expansion of vocabulary may come off as embarrassing or showy. Like Nikhil said, it's like gambling. If you use the word correctly, people will be impressed by your precision of diction and will assume there is an intellectual depth to you. But if you don't use it correctly, you may expose yourself as an intellectual fraud and risk humiliation from those around you. Inexperienced users should be careful when gambling with their self-worth in this fashion.
Moreover, many times the same ideas can be expressed whether the user has an expansive vocabulary or not. For example, instead of saying "I'm oscillating my time between my business and creative projects", one can say "I'm splitting my time between my business and creative projects". The meaning and specificity of the statement still remains intact, but without the gamble of using a lofty word.
All in all, expanding one's vocabulary is a noble pursuit and should not be discouraged by the UrRong statement that there is no need to gamble with one's self-worth on the choice of words. As long as the user is aware of the risks involved, they should absolutely take their shot at impressing the audience with their intellectual prowess! After all, nothing ventured, nothing gained. Besides, wouldn't it be more embarrassing to remain stagnant in your knowledge of language? Live a little, take the risk! That is, until you find yourself wishing you'd taken a mulligan on that last phrase.