You can calculate the approximate speed a vehicle will start aquaplaning at based the vehicles tire pressure (V = 10.35*sqrt(psi) ) [1]. A car tire is usually inflated to around 30-35 psi, which give an aquaplaning speed of about 61mph.
A road bike tire is inflated to 80-120psi which give an aquaplaning speed of about 92mph.
A hybrid tire is inflated to 40-70psi, which gives an aquaplaning speed of about 65mph.
Bikes aren't know for traveling above 60mph, so wet roads don't pose much of a problem for bikes. Their tire pressure is so high compared to their normal speeds, that an unassisted human would really struggle to make a bike aquaplane. Additionally bikes can easily be ridden stably at walking speed. Unless you're riding on ice, going slower simply doesn't pose a problem.
As a result slipping on bike, because you can't cycle slow enough, just isn't a concern. In the only situations where it might be a problem, simply walking would be challenging, and driving would be idiotic.
While interesting, this is almost completely irrelevant to bikes: The problem is not primarily water but wet ice or fresh snow.
Wet ice is especially dangerous because it can be pretty much invisible and you can transition directly from normal road surface to essentialy ZERO steering ability (and immediate crash if you initiate a turn or anything). There is pretty much no avoiding occasional crashes from this, the only way is to leave the bike at home when conditions are wet and close to freezing.
Ok, fine. But the argument above it that somehow these issues affect bikes, but not cars. Last I checked black-ice is just as much of a problem for cars.
And what about everyone else? Going sliding on a bike isn’t great, but it’s unlikely your bikes gonna put it self through the front of a shop and kill someone.
Your car on the other hand, you lose control of that, and bystanders are in real trouble. Not to mention there’s plenty of incidents everyday of people loosing control of their car because they’re not driving to the condition (presumably because the big metal box makes them feel much safer than they should) and killing themselves and others.
Much less likely that a bike rider is going to ignore the prevailing conditions and injure themselves or others, and if they do, the impact is substantially lower. Adding more mass and speed to an out of control situation never improves the outcomes.
A road bike tire is inflated to 80-120psi which give an aquaplaning speed of about 92mph.
A hybrid tire is inflated to 40-70psi, which gives an aquaplaning speed of about 65mph.
Bikes aren't know for traveling above 60mph, so wet roads don't pose much of a problem for bikes. Their tire pressure is so high compared to their normal speeds, that an unassisted human would really struggle to make a bike aquaplane. Additionally bikes can easily be ridden stably at walking speed. Unless you're riding on ice, going slower simply doesn't pose a problem.
As a result slipping on bike, because you can't cycle slow enough, just isn't a concern. In the only situations where it might be a problem, simply walking would be challenging, and driving would be idiotic.
[1] https://ntrs.nasa.gov/citations/19640000612