This whole issue arises because God gives us multiple perspectives of things in scripture, and we tend to miss that.
On many topics in scripture, God gives us many different perspectives, to help us to understand the topic more fully. It's just like walking around a house, and looking at it from different angles. It is only ONE HOUSE, but it looks different from different vantage points. The back does not look like the front.
Well, this is what God does for us in scripture, regarding various topics. He gives us descriptions of a topic from different points of view, so we can understand the topic more fully.
In scripture, there are different ways to view sin.
There is a sense in which all sins are equal.
All sins are equal in that they equally separate us from God, and condemn us to hell unless we have a savior.
There is a sense in which all sins are NOT equal.
All sins are NOT equal in that different sins create different types, and different amounts, of damage, in our current mortal life.
Both of these "senses" are in scripture, and both are true in their proper perspective.
If I steal a cookie, that is certainly a sin.
If I shoot you in the face with a handgun, that is a different type of sin.
Obviously these sins are different, and obviously they cause different amounts of damage and harm.
So, there is a sense in which all sins are equal,
and there is a sense in which sins are not equal at all.
Different sins OBVIOUSLY, and OBSERVABLY, have different effects on our lives.
It's silly, and unbiblical, to pretend all sins effect us in the same way.