The issue was whether ethanol destroys engines.
It doesn’t.
OK then. The ethanol doesn’t destroy engines. It destroys fuel lines and fittings in old engines. Also, if you don’t run the engine often, like mowers, boats etc. even new ones, the fuel will phase separate and the gunk that sinks to the bottom of your fuel tank will clog up fuel filters, injectors etc.
Why would you want to burn food anyway? Quit subsidizing ethanol and let it stand, or not, on it’s own “merits” or lack or merit.