You are correct. We only ask the saints to pray with us to God. We all pray to God - sinners and saints alike.
However, your sentence says “...worship that should only be directed to God, which is idolatry.” Really? Worship directed to God is idolatry? I’d have to disagree with you on that.
Are they not still HUMAN?
How do they then have the ABILITY to do this?
Millions of normal, earthly folks bombarding them with requests would require GOD-like powers.
HOW did they get them?