I'm curious as to where you got that information from. I haven't been able to find much on greenhouse house problems. I've put up a greenhouse around my banana plants during the cold months for the past two years with no issues. I'd imagine excess heat and humidity in summer would be a problem if there isn't enough ventilation but I read up on a guy in Sweden that had banana thriving in 47C (116F).
https://growingspaces.com/bjorn-oliv...degrees-north/