Isn't this just yet another example of the germ phobia which is so rife, today. If you can't deal with germs in the toilet I think you have a problem. Hands are eminently washable. How many nappies have you changed without resorting to bleach!
I'm not adverse to a bit of bleaching myself BUT I'm also aware that it's not good for the environment wh my DC will inherit and deeply resent uneccessarily filling the coffers of multinational chemical companies who create/push these phobias for their own financial ends.
Some of my family and friends don't seem to have a toilet brush [of course they may hide them] and they/their children don't bleach. I find it infinitely more disgusting to have to look at their excrement smeared on the toilet bowl. An aversion to this seems entirely natural to me and probably an in-built hygeine behaviour.
I believe that 'dealing with your own shit' is an essential life skill the world over. I feel uncomfortable using a toilet which doesn't come with a visible method of clearing up after myself and feel it's a poor host that doesn't this.
Rant over.