I think this is one of those statements that sounds reasonable on the surface but if you read it over a few times it doesn’t say anything concrete enough to pin down anything that could be refuted, even though I think the vibe is off.
So in return I’ll share my vibe, which is that my point was a small amount of struggle can be good once people are already determined to learn something, perhaps because they have found a spark for it. But before they’ve found their spark, all it does is turn people off. And in general, I don’t think struggle is essential at all. In fact I’ve learned a great many things successfully without struggling.