Perhaps some of the prayers are as you describe (which have their own problems) but we've posted hundreds of them, many tonight, which show Roman Catholics praying to Mary for specific requests in the hope that SHE will fulfill the request herself ("her clemency") - all of which should be addressed to God alone.
She will fulfill the request to pray for you if you ask, and that will be her clemency. Your justification will come from God, to Whom she prays.
What you do, generally, is discussing the form, which you find foreign. You then assume that because the form is foreign, the content is wrong. That is a leap of ignorance you make repeatedly.