Yes it is, with 1,3 kg complete and Levitaz Bionic maybe one of the heaviest carbon foil with 4,1 kg. But on the end hydrofoiling is not just about hydrodynamic and weight but also costs, stability and stiffness.
Liquid Force for sure stays also in 2017 a basic beginner product, which is affordable and stable and therefore need not to be the lightest and hydrodynamic best foil. So everything ok, also the Levitaz fuselage weights 1,2 kg, but pays back with extremly low glide resistance with the bionic backwing .... lets say, for a normal non mono foil
Apart from mono foils I prefer the heavy beast, where I don't need to care if it will break every minute, even if going just straight, but just my personal preference. Horue is making cool stuff anyway.