'Goodness, you are really struggling with this, aren’t you Outraged?!'
Yes really. I just cannot see the terrible problem with it!
The problems seem to be;
you'll get shit on your hands - No I won't and any residual germs will be caught in the wiping and antibacterial gel application process.
I might see the poo - I put the baby in the corner, head first, then kneel in front. The time between opening the nappy and wrapping it is about 5 seconds. So, no, unless you're really looking you won't see the poo.
I might smell the poo - Well, yes, but you'll smell it if I leave it in the nappy. The smell is from the poo, not the changing. The poo is done and cannot be undone. The quickest way to get rid of the smell is to change the nappy and wrap it in a bag.
The baby will be upset about lack of privacy - They won't. If I thought they were I wouldn't do it. If I was changing a child old enough or self-aware enough to be embarrassed I wouldn't do it.
They're all very minor or non-problems. We all seem to be in agreement that it doesn't actually do any harm. So, yes, I'm really struggling to see the massive problem with it. Is it ideal? No. If there are accessible toilets would I use them? Yes. If there aren't will I continue to do it in a quiet corner? Yes.
As far as I can see from this thread everyone is upset because they know they should be upset, but can't really give a reason why (other than listing more extreme examples e.g. in a restaurant/in a busy thoroughfare etc. which is a different issue).