Reach your own conclusion, but the vaccine administered in the US and other advanced nations is injected. It used a ‘dead’ virus, and you CANNOT contract polio from it.
In developing countries it is still common to use an oral administration with a *live* virus element. Children *can* contract (rarely) polio from this oral vaccines.
Is it economics or eugeniucs? You make the call.
It is for two economic reasons, first is the oral is cheaper and easier because there is no syringe. The second is based on the existence of modern plumbing and wastewater collection and treatment because the oral vaccine stops viral replication in the gut (it’s natural mode) and thus stops community transmission in places that don’t have plumbing and sanitation.
The dead virus shot prevents the individual from illness, but doesn’t stop community transmission if it’s endemic from lack of sanitation. It can still get picked up and cycle through your gut and you won’t even know because you don’t get sick.