No. For hundreds of years authors loved to use the em dash. It was a sign of quality writing. Only very recently has it stopped getting used and only because the - is on the wrong side of the keyboard and it's becoming more a hyphen instead.
When someone uses an em dash, it implies they arent using a normal keyboard; not even dvorak.
When someone uses an em dash, it implies they arent using a normal keyboard; not even dvorak.