Hard to say it's not.

It's a slightly difficult concept. People confalte praying to someone and asking someone for prayers. That could be do to poor catechesis. You will notice the prayers are correct though. e.g. The first part of the Hail Mary is quoting scripture. The prayer ends correctly, "pray for us sinners.." The other prayers are more nuanced. You really have to know her as our loving motherr to understand them properly (by proper I mean we know she is not God but a mother) I have never met a Catholic or Othrodox person who confuses Mary with God. God being three persons in one is complicated and we do pray to God the Father and to the Son and Holy Spirit as God alone but see how easy it is to think that's the same as praying to Mary? Our minds must always segregate. (And they do) "Them kingdom of heaven is like a mustard seed" And being a kingdom it has hararchy God has chosen this and Mary happens to be Queen of Heaven. (see revelations 12:1) and again "But to sit on my right hand and on my left hand is not mine to give; but it shall be given to them for whom it is prepared" (Mark 10:40) Since she is the Queen of Heaven she might be a good person to ask for prayers.