A word for a common statement, "I don't want to do it."
I'm not sure if this is a platitude, an adage, or what, but I'm looking for an accurate word for common phrases that aren't necessarily a proverb, like, "I don't want to do it."
I would go with declarative sentence or declarative statement.
As per the Cambridge Dictionary:
a sentence that makes a statement or states a fact.
(https://dictionary.cambridge.org/dictionary/english/declarative-sentence)