Who do you think?
So if you use “4th grade language” - even though you have graduated from a pretty good business school - there is something wrong with that? That argument is one the Democrats have used to denigrate conservatives. Obama sometimes uses big words, but does that make him any more intelligent or wise? Methinks not.
Words have one purpose: to communicate ideas to someone else. It does not matter how you do it, just that it gets done.