>>17932195 (OP)
Because all of these duchies, principalities, grand duchies and kingdoms were largely self governing
The vast majority of the people in Germany in 1895 never left the region they were born in
Those few who had businesses large enough to have dealings in multiple parts of the kingdom had the resources to deal with legal complexity
>legal chaos
>contradictory laws
This is like on /x/ and /pol/ where people will post close up shots of microprocessors and say something along the lines of "this is complex and I dont understand it, therefore it is proof of alien technology"
They figured shit out, life is complicated