Why should a fielding error by the pitcher count as an unearned run?

In the MLB many rules will never be changed (ex: 9 innings, 3 outs per inning). Many rules are being added or constantly changing (ex: pitch clock, universal DH). The rule change I have been saying for years should happen does not affect the pace of the game or even the outcome of the game. The rule change I am proposing only affects the players’ statistics, but I believe it has to be addressed.

Any casual baseball fan knows that if a player makes an error then that run is considered “unearned” for the pitcher. That rule is a good rule, it is not the pitchers’ fault that the fielder made an error, therefore he shouldn’t be penalized with an earned run. When a pitcher makes a fielding error the same logic is applied. I do not agree with this, the pitcher should be charged with an earned run because he was responsible for the run. This rule will never make sense to me, the pitcher made the error, of course, he is responsible for the run.

You can see Rasiel Iglesias, the Angels closer, throws the ball away allowing a run to score. No one was credited with that run because there was a fielding error on the play. The fielding error was by the pitcher though he is responsible for the run scoring.

This rule change may never occur and it doesn’t ruin the game, it just makes me frustrated. A pitcher is not like other fielders, but when calculated ERA a fielding error by the pitcher would be the same thing as a fielding error by the first basemen. It’s just not fair!