There's a similar tenet for purchasing refurbished hardware. The supplier only wants to stomach a single RMA, so they will put in the effort to make sure the re-certified doesn't ever come back.
That's not true at all. All work is a trade-off between effort/cost and reward. The person refurbishing the equipment will decide how much work is reasonable for the amount of money they are making on it.
In an ideal world, we want to sell something that works perfectly and don't want any returns for sure but the truth is we never know its perfect and perfection costs money.
A piece of hardware that has been re-certified has absolutely been through more extensive testing than those sold as new, its a simple fact of the matter