Lol, 80kg isn't really "mamil" fatboy cyclist sizing. It's not small either, but 176lb isn't that bad.
The Zwift cheats are usually in the 100kg range, and that' what they're willing to use on the video game. I can only imagine add some more KG's for "reality" out the door riding.
No hills in Zwift short of a few Alpe ramps and the radio tower are even steep enough for weight vs. power/aero. When a climb averages under 6% riders with equal w/kg but one rider with more watts period......well we know how that works out.