That's common knowledge about Florida, with respect.
Horizons had minor structural issues that were an easy fix. What it didn't have was a sinkhole to force its closure in 1994. For one, how could it have reopened just over a year later and remain open until 1999 if it had a sinkhole?
Would you build a ride system dependent on fast spinning vehicles with tolerances down to a few inches on the exact land known to be prone to sinkholes?
Energy has a sinkhole. There's one next to Odyssey. But there was not one between these two locations.
A third party wanted to build a thrill ride. Said party also offered to pay to take the thematically problematic 1983 Pavilion off the companies hands. Disney killed two birds with one stone. They didn't have to pay to update Horizons and someone else would pay them the privilege of removing the problem.