Lomed Mkol Adam-
1) The possuk says “V’Uhavta L’Reiacha Komocha”.
through the actual feelings of love/connection we are doing something which is inherently good.
2) The obvious reason why the Gemara states a negative comment on a Beth Din which gave Missa/capital punishment once in seventy years, is because of our moral feelings not to deliver such severe punishment on a person.
it’s understood that proper moral behavior would not commit Bi’ah Shelo Kidarkah even though it is permitted
Do you think any of the sages in the Gemara who might have been a Goel Hadam would have killed an accidental murderer?
Why did Rabbi Yochanon Ben Zachai greet nicely every Gentile he met in the street; wasn’t it because of his natural moral feelings? Also, Rabbi Shimon Bar Yochai who returned lost objects to a gentile even though halachically it’s permitted to keep “Aveidas Nuchri”; wasn’t it because of his moral feelings?
The proper place to look for answers to these questions is in the rishonim. There are multiple mehalchim offered that are plain and simple.