To be clear: I'm not European nor do I live in Europe.

I just looked up a flight, for example London to Paris. The cheapest BA ticket includes hand luggage for £57 each way, or the next option with checked baggage is £14 more.

I'm sure there probably are cheap-and-shit airlines that include nothing with the ticket price as you mention, but there clearly are also options where you pay a small fraction more (and certainly less than "additional baggage" charges) and have baggage included.