Try to paste the Gettysburg Address. "Four score and seven years ago..." - the sentence is very hard to read. "all men are created equal" and "we are engaged

Try to paste the Gettysburg Address. "Four score and seven years ago..." - the sentence is very hard to read. "all men are created equal" and "we are engaged in a great civil war" - passive voice. And so on... The moral is that you should not trust an automatic tool to judge your writing style.