You're allowed to go up to 6km/h using the motor but without pedal assistance, according to the Qld Transport website, which I assume means you can use a throttle here..
I'm a regular cyclist, both electric and non-electric, so I know exactly what you mean about the ease of cruising at those speeds. I've got a torque sensor ebike where you have to use your legs a bit, and forgot about how little effort is required on a cadence sensor ebike like I think the rental ebikes here use. I've been wanting to do a ride with my non-cycling partner, her on the ebike. That may educational, since she seems to be more the target audience for rental escooters and might have a different perspective, whereas we seem to be more experienced on 2 wheels
Regular rider here too. I forgot about the cadence sensor ebikes that you can basically ghost pedal to the engine cut-off. I'd still argue that it's more effort than twisting a throttle, but that's just me being pedantic. My ebike rides don't even trip the auto workout function on my watch.
I'd love the 32 km/h limit from NZ, you definitely feel the weight when you hit 26 km/h on a heavy bike with fairly wide gear spacing. Still, all it'll take is one accident taken out of context for the pitchforks to come out