Ill take a stab at trying to help your point as i see it... imagine that the subscribers to this belief are or feel like ants or automatons, or beings or something that are small and inconsequential, and the reducible of all things from to 1 and 0 isn't a large leap of number crunching. from infinite down to zero, more like something small down to zero (Reduce before reducing) continuing in the system as the small who feel smallest see it, to work/live struggle to further add to suffering et al would seem unconscionable so long as suffering et al (you use the perennial trolley problem) would be continuing to grow even as a byproduct of any work or efforts.

In this particular zero sum trap... which I take it you seem to find more funny than tangible as a working philosophy (not saying I disagree)... annihilation is like a death wish.... I think a more fair evaluation would be what is annihilated is the effort and motivation to continue contributing to living (which isn't quite a death wish but no less problematic, I hope we can agree). Like a bug that won't work, or a piece of a system or robot that lies down or spins in place instead of finishing its task/job. The death of traction, or motive to build or create or add to anything is their illness, and that illness can only be described (to them) as suffering.

Which is to say the valuation of that philosophy is that its a problem akin to depression or mental illness that probably doesn't need to be laughed away or casually dismissed but Rather dissected carefully like in an autopsy and studied closely.