Really? Is it a question, or a false witness masquerading as a question?
Why can Catholics not just admit they worship Mary
That would be a lie. You're asking why folks don't lie about themselves. That's beneath contempt. It's appalling that anyone would even ask the question you just asked.
Not true... Not all RCC or EO's worship Mary, but some DO.. I know some of them.. Some even prostrate themselves before Saints.. or alleged pictures of Saints.. Denying it is silly and disingenuous.. Now if you cut them a blank check for reverence, thats another thing.. Buts its still idolotry.. nevertheless..