They continue to invest in the IP in the parks that already have it as the licensing fee is per park regardless of how many rides they build.
Epic is an outlier as that was designed years ago and even then, that was being designed with the intention that Fantastic Beasts would be a success and has since reverted back to Potter even if it makes the whole Paris area a confusing mess.
It's not about whether they think that it will mess with Orlando or not, they don't want or need Potter in the GB park. Universal also wants to concentrate on its own IPs with less use of external ones.
If it's coming to a choice between Potter or maybe LOTR, I think it's an easy choice, especially when they want an anchor area for this park that's going to make it unique.