Now, the funny thing is that most parents, when their kids are ready for a real bike, they put them on one with side-wheels (support wheels?) [1, 2]... My wife and I were looking at kids doing this and were thinking the same thing: "Wait, this is unlearning the whole thing they learned about balance and steering on 2 wheels! Let's go straight to no-support-wheels!" And voila, there they were, within a couple of attempts (we ran along) they were riding around! While many kids struggle when their support wheels come off.
Since then we joke that we are part of the anti-support-wheel-club when we see kids steering uncomfortably on such a bike. Which is really awkward since the bike has to stay upright, the kids have to hang to one side for balance when steering. And yet, it remains the most (or at least, a very) popular way.
[0] https://www.babyhomepage.nl/wp-content/uploads/2022/09/Loopf...
[1] https://media.s-bol.com/qQv4Y69p8j33/1155x1200.jpg
[2] https://bike.nl/loekie-booster-kinderfiets-12-inch-jongens-g...