You'll end up with more rats and jellyfish, and less whales and elephants.
Moreover I kind of agree with Taleb on the Black Swan / Antifragile theories: the more we protect something (our kids, world finance, ecosystems) the more fragile they become, and the more dangerously they fail when they fail (because they will fail, it's just a matter of time).
I think this is well understood for startups and projects: fail early, often, learn from mistakes, what do not kill us makes us stronger, etc.
This is obvioulsy the same when growing kids, and I personally take care that my 1.5 daughter is falling enough on the safe floor of our house and eat enough dirt in our courtyard, so she will not be fragile when going to kindergarten, where she will catch viruses anyway.
I think this applies equally well or better on natural environment: if we protect an ecosystem in order to prevent it from disappearing, maybe we are just prevent a new, more solid and more adapted ecosystem to appear there.
I know, this is pure heresy. I think we need more heresy.
It's not thinking critically about the issues in play or how they would affect the lives of millions or billions of people, let alone the animals, plants, and microorganisms involved. It's not heresy, it's just hubris.
Do you know that in France many industrial projects are stopped because of such reasoning? For instance, a guy has a factory there, and it's working well, and he wants to expand to the neibouring wasteland, which is conveniently placed. Then some guys come and say that some specie of triton is living there and might be disturbed, and the project is cancelled, and the factory guy must build another factory far away, and it's an headache, and he gets some "compensation" from the local administration, which is just people's tax money. All of this because maybe, just maybe, a triton will be disturbed, which will break the natural cycle, which will create an invasion of cricket, which will kill us all, but just maybe... (All of this come from a stupid misunderstanding of the butterfly effect)
Also, can't we think a bit out of the party line there? I am a nature lover as much as anyone, but I think we currently do not trust its resilience enough, and it is dangerous. Am I allowed to share these thoughts? Am I rude or something? Could there still be some topics that we cannot question? Then why? Maybe these topics are weak too, and will break if we question them. Which means they will break anyway, and will break much harder if we protect them from criticism. That's dangerous.
You can come back from a small virus, your family might even become stronger after losing your first daughter as she wasn't strong enough, but when your house is bombed and you all die, your family won't be coming back.