I have noticed this kind of thing so much and have been wondering if there is an official name for it? This is the belief whereby if action X is considered good, then any intensification of that action will be accompanied in lockstep by a correlative increase in goodness, even if you take it to the outer limits of what's possible. Here are some examples:
In Saudi Arabia, modesty is considered good. Therefore more modest must be better. And yet more modesty is even better still, leading to the point where you have mullahs recommending that, to really be moral, a woman has to wear an eyepatch over one eye as well as the niqab.
Having a child is a wonderful thing. Therefore having more children is even more wonderful. To be even more wonderful still, one has to treat a woman's womb like a clown car, not allowing it even a moment's repose as it relentless thunks out a succession of miracles, et voila! Quiverfull families!
Maintaining childhood innocence is good. Therefore trying harder to maintain it is better. But to truly be moral, it is necessary to treat young children as utterly incapable to operating independently in the real world, and have to be kept under lock and key until the moment a partner is picked for them. Bro Randy personified.
Having faith in God is good. Having more faith is better. Therefore having so much faith that you are willing to allow your young child to wither away in agony, rather than get them to a hospital is the pinnacle of goodness.
And now this guy. If reading the Bible is good, then completely ignoring all other possible human activities in favour of further reading must be better.
In all cases, we have people who are so fixated on a particular facet of moral behaviour that they monomaniacally ratchet that behaviour up as far as it will go, with the ignorant assumption that they are guaranteed to be considered more moral than others. It is purely about display, rather than a measured consideration of what will be best for humanity.
This is such a primitive and thoughtless approach to morality, completely divorced from the need to actually maintain human well being and happiness. Is it any wonder that people are unimpressed by it?