wd40 is not a lubricant.
One (not recommended) way to test this statement is to spray some on the kitchen floor and see what happens later.
Repeating bullshit many times doesn't make it true.
It is a mixture of a lubricant and a solvent. And once the solvent evaporates, only the lubricant remains.
It literally says it is a lubricant on the can but you can’t find a thread on the Internet about it without someone saying that. It is a lubricant, just not a very good one for most situations.