Well, it isn't where I live. Kids from about 1-3 years old get these little 'walker bikes' that have no sidewheels or anything (no chain or pedals either), they use those to learn balance, then after that they get their first bike (age 3 and up) which they usually can ride on right away. By the time they go to grade school they can cycle with the best of them.
Learning how to cycle at a much later age is far harder.
Yeah, that's what I know if as a balance bike. Once mastered moving to a pedal bike is much easier because you've done the balance bit.
We did that bit by removing the pedals and lowering the seat. Once they can cruise then stick the pedals on, adjust the seat, and they're away ... but that's not just "getting on a bike", that's a progression of training.
The thread parent said "never picked up a bike", you transmuted that to "used a training bike and then picked up a full one".
Not pertinent to the thread but the flaw in this technique (balance bike) with my kids has been they learn to brake with their feet and that instinct is hard to break.
Learning how to cycle at a much later age is far harder.