Woah woah woah. Not even close to true. The only things you can fly without a license is a single seat ultralight, paramotor, and similar things that most people would barely think of as a plane. There are very specific and restrictive requirements, both on the aircraft and what you can do with it.

Anything bigger, homebuilt or not, will require a LSA license at least ans many (if not most) a full PPL.