The longer the sentence, the less it's able to imply,
and writing by implication should be one of your goals.
Implication is almost nonexistent in the prose that surrounds you,
the prose of law, science, business, journalism, and most academic fields.
It was nonexistent in the way you were taught to write,
that means you don't know how to use one of a writer's most important tools:
the ability to suggest more than the words seem to allow,
the ability to speak to the reader in silence.