This is a German fudge unfortunately as they keep chasing higher performance aeroplanes and apparently all think that they weigh the same as Hanna Reich in her prime.
Light aircraft regulations (and microlight regulations here in Britain) require that an aircraft can't exceed MTOW with at least 86kg per seat and fuel for one hour at max continuous power.
Mostly the Germans do aviation quite well - but in this specific aspect they are living in a strange fantasy world all of their own.
Yes, lighter aircraft with better payloads do exist - just not at the high performance end.
It's not necessary either. Microlights in the same class in the UK - CTs and EV97s for example typically come in around 265kg without a chute and around 272kg with one.
G