Not my construction on reality.
Appears to me that down through the centuries, it repeatedly became politically profitable to up the ante a bit more about Mary.
Oh, Q, you shouldn’t blame the Latins for Marian devotion. Its 100% Eastern in origin. In other words, blame us Orthodoxers! By the way, no one in my family ever profited politically from our devotion to the Most Holy Theotokos...but we have spiritually! :)