@stewmberto
No, the author was the one that decide to set the story in a time that mirrors medieval Europe, which is a trope in those stories if you haven't noticed.
The presence of magic does not disconnect the setting from the historical inference that it brings, as demonstrated by the use of nobbles and royalty in the way it is used as well as the influence of the church.
You may have low standards and accept anything that is thrown at you, I do not. Consistence is the most essential thing for any narrative to maintain itself and the reason so many shounen become trash very quickly.
E