That's because the way in which other pseudo-intellects run their lives significantly affects my life...
If nobody takes ULV, everyone will get many more paid days off, so this pseudo-intellect thinks getting effectively more pay for less work is much better than getting no pay for no work - and I can save my "leave" plans for when I have paid leave. The fact that contractually-required paid leave has not been awarded is another issue worthy of contract compliance....but what do I know, I'm just a pseudo-intellect.
Also, this "we would all get more days off" plan only works if they can't suck enough bored old guys or easily-fooled young guys into ULV, leading up to the next unnecessary SLS, which won't happen or be taken up until the conditions set during the last SLS are satisfied (25-yr housing, primarily). But again, what do I know?