But statistics will be statistics. It's not the total number of fatalities which are important, but the overall percentage of fatalities for the number of active operators. I would suspect that there are a LOT more cycles on the roads than hobbyists buzzing around the skies.
You are correct to point this out. However, those statistics compare JUST motorcycle rider fatalities with ALL power aircraft occupant fatalities - which means it includes everything from large commercial aircraft to things like helicopters and light planes and ultralights (but not gliders). There is no further breakdown, and that category covers a lot of people doing a lot of stuff, not just ultralight hobbyists. Queensland is BIG, people fly there a lot and for many reasons.
No doubt, motorcycles can be quite dangerous even if you are careful. A lot of what makes them dangerous is other drivers with poor awareness.
For the curious, there were a total of 324 transport accident related deaths in Queensland for 2022 (V01-V99).
Interestingly 11 people died due to "Sleep disorders (G47)" Even sleeping is dangerous. A further 4 people died from falling off chairs (W07), so sitting can be dangerous too.
Life is short, don't worry too much, do what makes you happy, just please try to be as safe as reasonably possible.