The current category for this game is basically a meme category, where you don't have to actually try and beat the game.

When I played this last year, I considered it beat when I got the high score in all events. Can we get that added as a Category, to get this game out of meme run territory?

This is similar to how World Games is setup: there the category is "All Golds" in the events. https://www.speedrun.com/world_games

It doesn't look like this game has default scores to beat. Scores only appear when the player sets them. There's also no medal system like World Games.

For Hot Dog Aerials, it's possible to get the perfect 10, but it feels like it's completely random?

For Speed Skating, this is pretty much the only event that can be beaten faster. At a minimum, you'd need to beat the computer pacer.

For Figure Skating, you can get the 6.0 if you play correctly. Read the manual here. This means doing all 4 types of jumps, doing at least 6 rotations in a spin, and doing all three types of spins: camel spin, sit spin, camel spin to sit spin.

This TAS by Foli shows what a perfect playthrough of the game would look like.