There is validity in this POV.
I am so far from being a religious scholar or very learned about Islam, but something that I was taught was that while gunnah/sins can be classified into either gunah-e-kabeera (major sin) or gunah-e-sagheera (minor sins), if an indvidual knowlingly and repeatedly commits a gunah-e-sagheera (minor sin), it too becomes a major sin. Allah looks at the intent and the repentance (or lack thereof) of sinner.