Can Masonite Be Used For Underlayment?

Can Masonite Be Used For Underlayment? It is not approved by any tile manufacturer, as an underlayment for their productes. They require you use a hardwood(birch) 1⁄4” thick, finish grade plywood approved for flooring underlayment. That’s not to say Masonite isn’t used everyday for underlayment by uneducated or greedy contractors. What do you use Masonite