Right, i suppose the point of departure here is, i don't think a beginner necessarily has to succeed at something right away...
I think this approach to teaching is quite important to be honest. It goes beyond just one technique, but to teaching methods as a whole.
IMO, as long as a technique isn’t “wrong” fundamentally, being able to perform at its finest isn’t really that important when your a white belt. With time I’ve learnt that the worst possible mistake when teaching to noobs is to teach too many details or to tech a technique the perfection. For example, X technique requires a certain number of steps to make it work from white to black, if done correctly, thing is, most of the time, besides doing the right steps, the most important thing normally is timing, so no matter how perfect the person perfiomrs the technique will never make it work against a much better grappler. Insisting isn’t doing a technique to its perfection will normally take the focus out of the person, not only that, it’s quite hard to remember all of the steps when your just starting (not the case with armbars though, I’m just using this topic as an example) what the person should be learning is the concept of the technique, details are not that importat, why is the tech iqie working or what is the goal of the technique is the most important thing to transmit to a white belt, as the person gets better he Can learn the details that make the technique work on better people. My forte are triangles, I do not teach the “ryangle” right away to white belt.. why? Because I rather have them understand the concept of the technique first. I teach first the traditional way, explain to them how the choke works, I do however show them how I do it, but it is also fine the traditional way the differences , but since it’s quite more easy to pull off in a roll the traditional way, it’s ok for them to do it that way, as they get better with escaping the hips, they can transition to squeezing from a 90 degree. Just and example, basically make them have fun, they aren white belts they should have fun, stressing too much into details will confuse them more, Most techniques they will do will not be perfect, but will work on white belts and regular joes, so it’s fine imo. The will need to improve their technique as they advance, its natural, I’ve been taught the 4 steps armbar from the start, but i haven’t done one of thsoe in believe in the past 8 years or so.