As someone with nearly 30 years experience in various types of construction, I can say for a fact that this is objectively incorrect. There’s a trope about any kind of social media content that touches on a subject about which one has real expertise, don’t remember exactly how it goes, but anyhow, let’s just say that the ignorance in this thread is absolutely astonishing.
Go down to your local big box hardware store and try to find a single-pane window, for example. You can’t because nobody makes them. If you want a single-pane window you have to buy a sheet of glass and know how to install and glaze it yourself.