While you may see "veterinarian recommended" printed on pet products, my experience has been that vets don't generally recommend pet products that they don't sell in their practices. Except for Feline Greenies.
We all know the ongoing human interest story of Christmas Trees making good in the Big Apple each year. The first Christmas tree transported to Rockefeller Center was erected in 1931, during the Depression-era.
If I'm sitting, my cat wants to sleep on my lap. If I'm lying down, he wants to sleep on my stomach. That has forced me to start sleeping, uncomfortably, on my back. Dare I get up and I'll hear about it!