I lived through Hurricane Hugo. Before it came about, most people didn't worry about tornadoes much in my area when there was a watch. More people took warnings seriously but a significant amount of people would "know the signs" and go about their day anyway. Hugo hit and devastated everything. Trees through houses and everything. It is hard to describe in a small sentence how much the wooded landscape changed for over a decade but it was common for trees to just be laying down everywhere in the woods. It was now common trails were cut through swathes of logs.

For a time after people would take tornadoes seriously again. Slowly but surely though, you'd see that neighbor that never mows their lawn think the best time to finally do it is when there's a tornado that touched down near just to show they can defy it. Driving during warnings is one of the worst things you can do because the roads are static and traffic won't just abide for only you. The road doesn't just stay clear of obstructions from trees, powerline poles, fences, etc. You can very easily become trapped very quickly.

I think like anything else when people deal with tornadoes regularly, they become complacent. People think about them like they can just see them a bit off and have time but tornadoes will hop around or form just wherever very quickly. Some people's attitudes become "this happens every year and I survive around 15 tornadoes a year and it doesn't really effect me much personally, so it's no big deal really. You just have to know what you're doing." when it was just luck all along.