“What do you make of other Catholic’s lavish displays of Mary in and around their homes?”
I’ve never seen any “lavish displays of Mary” in or around any Catholic homes. So I “make” nothing of it.
https://www.catholiccompany.com/mary-statue-c62/
These things seem a bit pricey for me; thus the term lavish.
Perhaps you live in a poorer neighborhood and don’t get out much.
I am in the Philippines. There are "lavish displays of Mary" in about half the houses around here. Roadside vendors are selling Mary grottos all the time.
Most Filipinos are Catholic on the surface, but below the surface, are animists. They worship spirits, and are generally very superstitious, but Mary grottos are numerous.