Lenin also warned against this tendency. He correctly highlighted that while the workers most definitely WILL spontaneously struggle with the bourgeoisie for economic gains, this spontaneity will never magically create hordes of dedicated, ideologically sound Marxists.

Full agreement, I was juxtaposing the two positions of "attempting to build a political movement" with "waiting until the contradictions are heightened enough" to basically point out that "in either instance education will be key" because when we have many leftists not able to correctly identify the fundamentals of Marxism, it will not spell good for a hypothetical political movement nor transforming agitated proles into ideologically sound Marxists.

That being said I would just share this particularly bloomer quote that Mao has in "Where Do Correct Ideas Come From?" that,

In social struggle, the forces representing the advanced class sometimes suffer defeat not because their ideas are incorrect ! but because, in the balance of forces engaged in struggle, they are not as powerful for the time being as the forces of reaction; they are therefore temporarily defeated, but they are bound to triumph sooner or later.

here being that: suppose our ideas for revolution may in fact already be correct. We should not sit on our laurels about it then. We must educate the proletariat on these ideas so that they will be enabled to use this to continue to adapt to a changing situation. Perhaps along the way we find out our ideas need modification and so we make the modification at that time. I don't believe this is in contradiction with Lenin's warning.