As a defender, mostly is about establishing yourself either as a smart/respectful defender or a butcher. But to be on elite level both of those traits are nothing without self confidence of what you are doing is right. If you are a butcher you would tackle the shit out of player but in no second you would question your decision to do that, refs see that and mostly dont question your decision because in theor preperations for the game, they are instructed that this player play this way.
Araujo is perfect example how self confidence which is closely connected with decision making can ruin you.
As a defender you need to be sharp, sometimes is a red card but in dying minutes. Calculated risks.
Unfortunately, our ronald mcdonald has all the attributes to be a butcher, bit he is not smart enough and never would be.
He would always be a target for a top teams.