I think you may find it is you that does not seem to understand that there is a world of difference between a regista and what is well considerred to be a DM.
Diego Simeone, Dunga, Graeme Souness,Didier Deschamps and Claude Makelele were all Defensive midfielders.
Veron, Pirlo, Alonso, , Modric, Kroos, Requilme, Xavi were or are still considered to be registas.
All play in the same DM, role.
With the first list none of the these players required minders to compensate for any issues they may have defensively.
However, with the second list you will find most of these players have or had the team shaped around them with at least one or two defensive midfielders sitting along or behind them.
Given it is expected that Jorghnio may be a replacement for Fern, if you cant see or understand the difference between the two lists of players and what this may mean if Jorghinio is not playing alongside someone like fern who has a balance in attacking and defensive qualities, it is you who has an issue with understanding.
In more simplistic terms John Stones and Phil Jones are both central defenders but there is a world of difference in their skills and how those skills allow the team shape, formation or philosophy to function.
You dont just stick a number six whoever it may be in a dm role and then expect him to play like xavi and defend like keane just because he is occupying a dm role.
Its a nonsense.