The relationship with God and Judaism

B.E.
Hello Rabbi Michi,
A question I thought about before the giving of the Torah:
Reuven, a Torah-observant Jew, is as careful about what is easy as it is difficult, at the age of 45.
Ask yourself, "If I were to discover that I am a Gentile (let's say I was adopted from another country, and they haven't found out until now), would I choose to convert?"
The questions are:
A) If he answers himself the answer 'no' or even if he hesitates and suppose he eventually says yes, does the fact that he answers himself the answer 'no' or even hesitates mean that there is any reason for a flaw in his current relationship (whatever it may be) with God or Judaism?
What is this like? A married couple and there is peace and harmony between them, but after 20 years of marriage it turns out that there was a problem with their wedding ceremony and they are really not married, so the wife says to her husband, "So let's go tomorrow to the person who is arranging the wedding ceremony and wedding ceremony and get married." Her husband replies, "Wait a minute, not so fast, let's think about it, maybe each of us will go our separate ways…?" Even if her husband thought about it and in the end decided yes, I think the wife would be very, very hurt by the very hesitation, and it gives rise to a flaw in the entire relationship.
Perhaps according to the method of the rabbi who advocates lean Judaism, then there is only halakha, and then there is not that much difference between a Jew and a gentile except for the number of commandments that are binding on those who believe, so it is only a matter of quantity, so we can liken it to an employee in a company who thought for a moment that he had 100 tasks to do, and after a few years discovered that he really only had 7 tasks to do, then there is no problem with him stopping doing the 93 unnecessary tasks and doing only 7 and no one, neither the CEO nor the VP, will be harmed by it.
b) What is the correct parable? Or does the rabbi have a different parable?
Thank you very much,
Blessings and success.