Is every species of living thing on the planet equally deserving of protection?…
Some must be protected.
Some ought to be protected.
It’d be pragmatic, prudent or prescient to protect most.
A few I’d just as soon see dead. Very few.
Some actually don’t matter much either way, except in an abstract aesthetic sense.
Worst of all, the definition of “species” is biased towards charismatic species (we fine grain populations that look good, and coarse grain over populations we know little of or care little for); so at some deep level the question is poorly defined.
We should preserve biodiversity, to the extent we feasibly can; with the exception of a few bundles of genes we might want to pre-emptively annihilate.
(300 cubits long, in case anyone cared…)