I've always have had this question fueling in my mind. Personally, I think that probably another incident. Maybe even worse would have happened. But, let's pretend that there was NO INCIDENTS AND THERE NEVER WAS!
I think Wonderland would of never been built because it was because of the void of LPS that got Wonderland going in the first place. 7 people would still be around today. A family would not be in smithereens. Probably the owners would of either tried to knock down the park like they tried to do in the early 70s. It may of been successful. But I think that if it stayed. The Big Dipper, the Ghost Train, and the River Caves would have also became heritage listed. I don't think that Maloney's Corner, and Lavender Green would exist in this world. And lots of rides around the front of the park and where the Wild Mouse is today would move around. It would look more like Luna Park Melbourne now basically.
But what do you think? And also I want you all to check out this video uploaded by Yyosh. It's about Clive James going into a empty and abandond LPS in 1991 during a storm. It's great, and I think you should watch it too!