Because it has a mass large enough to be awkward to launch in an Ariane 5 upper berth or with Proton. "Super Heavy" is a bad choice of words since rockets thems

Because it has a mass large enough to be awkward to launch in an Ariane 5 upper berth or with Proton. "Super Heavy" is a bad choice of words since rockets themselves are often classed as "medium", "heavy", and "super heavy", and this satellite is nowhere near the mass for needing a "super heavy" rocket to launch.