By the way, another example of such roundabout logic is the famous Minchas Elazar which allows clapping on Shabbos:
You’re not allowed to clap or dance on Shabbos, except for a Simcha Shel Mitzvah. So since a Tzaddik really feels the holiness of Shabbos, for him clapping and dancing becomes a Simcha shel Mitzvah, allowing him to clap on Shabbos.
So if one really feels the holiness of Shabbos, he’s feeling a Simcha Shel Mitzvah, allowing him to be lenient in a practical Halacha of Shabbos.