I'd propose a reasonable compromise on taking dogs into crowded public places,
no matter how well trained they are,
is to voluntarily keep them muzzled.
I'd guess it's not impossible to buy well fitted comfortable muzzles
that still allow a dog to drink and eat small treats.
Facilitating quick release when in a situation where no kids,
or timid nervous adults [giving off the scent of fear],
can bother them...???????

In parks and fields, beaches, etc where your dog is unmuzzled to enjoy sticks and balls,
then it'd be our responsibility to train them well enough to return to heel and lead,
if kids, other boystrous dogs, and unknown quantity strangers get too close.

As for thugs with with deliberately trained attack dogs,
I'd back any law to permanently impound their dogs,
with hope of rehabilitating them in rescue centres.
Only as a very last last result should they be put down...

I can't be arsed googling which, if any, nations impose compulsary muzzling in public.
But I wouldn't fight against it if implemented fairly & sensibly...