I've got two boys with a short age gap.
Don't remember having to move a ton of stuff out of the way in case they touched it (although I've never been one for ornaments etc), but did make sure gadgets and computers weren't left where curious fingers could get to them.
But what made me move stuff, was the constant wrestling, puppy fighting, running to do handstands on the sofa etc etc. Arms, legs, feet everywhere....
My friend had a perfect dd who could keep a desk full of crayons and felt tips in their perfect cream and beige house, but when she saw the laundry marker my two had put on the hall wall, said 'but why do you let them do that?' LET hahahhahahaaaaa.
So she hated her nephew being in her house 'because he throws things' like it was a terrible thing for a toddler to do.
I was so happy when she had a 2nd child and realised her dd is just a goodie two shoes, and her 2nd child is the one you can't leave unattended for a nano-second or they will take the laundry marker out of the shopping bag and remove the packaging and attack the walls with it!!
I am not a free range parent. I just have two lively, curious, physically demanding children and choose to take the path that preserves my sanity best.