Now it may be that polio is much heartier outside the human body than ebola but it is considered to be "highly contagious" and before vaccine there were half a million dead a year worldwide.
So yeah, you're right, nobody is talking about this with any candor. Obviously "it's hard to catch" is bogus and it'd be nice to have some straight answers.
And, people who have NOT been vaccinated with polio should NOT change the diapers for six weeks (IIRC) of a baby who has taken the oral polio vaccine.