This question may sound strange but I'm attempting to find a source for an argument I heard made by someone very recently. I'm assuming this is a known argument which I'm just unfamiliar with the source.
When I speak of Baal Teshuva I specifically mean a Jew who was born and raised in a secular household. Not a Jew who was religious, left, and then came back years later.
The argument that was made was that while all Jews are given the same commandments, Hashem holds different Jews to different standards of reward and punishment based upon their upbringing.
A Baal Teshuva would be held to a different standard from a typical Jew because their situation is rooted in correcting a mistake. Everything they do is ultimately rooted in an effort to become an observant Jew and since they are fighting assimilation and regrouping themselves on a cultural/spiritual level, Hashem looks at their successes as greater and their mistakes as being lesser.
An Orthodox Jew, on the other hand, would have been raised within a household knowing the law. This means that they are held to a higher standard of judgement based on the fact they couldn't claim ignorance or fighting a previous assimilation. The layout of their upbringing would mean their mistakes are held more against them while their successes aren't as successful as the Baal Teshuva.
Now I have previously heard a similar argument with regards to assimilated Jews. The argument basically being that Hashem doesn't hold the children to highly assimilated Jews accountable to the same degree because they were raised in ignorance. This is the argument I'm aware of.
What I hadn't heard before was the idea that after this type of Jew is weaned back into the faith, their successes are greater and their losses aren't as heavily emphasized. Their existence as a Jew at all is effectively a miracle onto itself and thus being a lackluster Jew is better than being no Jew at all.
I was curious if this was an exaggeration on the part of the person who argued this point or if there is a clear source for this point.