It’s required because it’s a safety issue. I think that’s the intent behind almost all mandatory sensors. That’s why the post put “useless” in quotes. I’m highlighting just that it may be required because it’s needed for safety.
However, many motorcycles have ABS as optional equipment and many people (non-stunters) don’t opt in for it. Meaning, many people don’t recognize (or don’t care enough to pay) the safety aspect.
I never thought about ABS while purchasing my little 250cc Kawasaki Ninja about 20 years ago, but in retrospect, I wish I had it! Skidding isn’t as bad for vehicles with 3+ wheels; they stay upright, at least. It had rained earlier that evening, and for whatever reason (skill, pavement change, oily film on the road surface, etc) when I braked before a turn the back-end slipped out from under me. Luckily, I walked away with just a sprained shoulder, broken thumb, and a spot on my kneecap worn down to the bone.
I thankfully was wearing riding gloves, helmet, and boots; the pavement wore through several layers of the leather, my hands would have been shredded like my knee, or worse.
Using ABS sensors to justify new regulation is a circular argument if those ABS sensors were installed because of regulation. I was arguing otherwise, that ABS would be installed in a big majority of cars no matter what, and that gives a non-circular argument.
Looking up some data, it was about 75% of cars and rising in 2007, so not as high as I expected but still pretty high. There's some circularity but I'd say it's mostly not circular.
I posted that they are installed for legal reasons. The other commenter posted that less sensors are required because they piggyback on another system. That other system is also legally required. That is a circular rationale because it’s still pointing to a legally mandated sensor. Nearly all new cars have ABS due to safety mandates.
You seem to imply that the legal and safety are independent. I am saying they are linked.
Ie there wouldn’t be a legal reason if it weren’t for the safety reason. So pointing to the safety is why it’s a circular argument.
It’s like disagreeing that smoke detectors are because they are legally required in homes because people want them anyway for safety reasons. Both can be true at the same time because they both are related to the same risk mitigation.
In any event, the OP was that some people don’t want those sensors, my point is they aren’t optional.