We subscribe to the don't touch theory. It is more exhausting for the parent but I think it's more rewarding because when you go elsewhere that isn't child friendly your children will listen and you can enjoy yourself more, rather than being on top of them 100% of the time. It is hard initially but it's definitely worth it
Ditto to all of what Rouge says It is very hard, but in the long run so worth it. For example, I can leave candles burning on my dining table with both kids (5yo & 22m) drawing there & not be worried about them touching.

I'd be very cross if someone gave either of my kids something valuable like the snow globe without adequate supervision too. My DD has a swarovski Tinkerbell which is up high on a shelf in her room. Every now & then we get it down & she is allowed to sit on the floor & hold it to have a look. She knows to be gentle, but I sit very close just in case she forgets.