Isn't that called searing the conscience? And there is admonition on that, no?
I can justify any sin I or others do, no prob but as James and others pointed out, that ain't the point.
I must confess I personally did run into something similar while growing up. Religious upbringing, schooling and such. Teen years were tough and sin ran amok. As I grew up I found confession could be an almost hourly deal, so phtttttt I piffle, said I.
I learned to "rationalize" my issues for the next half-century. So it is now automatic and requires arduous mentation. Lots don't want to do such, so searing the conscious is so much easier.
Lent is a drag in that sense as it is a time of true reflection on one's self for the purpose of the realization of God and us. Of course it is also a joy as well when one recalls we asked to be enlightened by way of His illumination.
As today is Forgiveness Sunday, those that gamble, whore, drink, sin proudly and such have to much Pride to ask forgiveness all while needing it badly. Their "feeling good & happy" is the illusion.
Pray for them as well.