Stephen Krashen's Input Hypothesis says that you need comprehensible input. Immersion as a complete beginner does not give you much comprehensible input. He advocates that you need what you listen to be 95% understandable, which means you have to start with very, very basic input. Personally, I find 50 - 60% is good enough for me to improve if only slowly. I went to France this year after 7 months of listening to French for 2 hours a day. During that 7 months I went from DELF A1 level material (complete beginner) to YouTube videos from native speakers talking about things that interest me (such as physics). I took a French immersion course in France and was tested at the beginning as B1 level. So, the input hypothesis method got me from complete beginner to intermediate in 7 months without immersion. I did not do any speaking until after 5 months of listening.
That's interesting. I learned of it second hand, and must have got the wrong idea. I thought the whole point was that it's the way everyone learns their first language, as babies? When you start, nothing is comprehensible. But with enough input, everything becomes comprehensible!
On the other end there's Khatzumoto (All Japanese All The Time[0]) who spoke as late as possible, getting as much exposure as possible first (had Japanese audio on 24 hours a day for 18 months).
After 18 months of "input-first" learning, he did a phone interview with a Japanese company and was treated as a native speaker (and hired and moved to Japan).
Benny's method is about getting a "workable" level as quickly as possible (at the risk of forming bad habits in accent early on, misusing grammar & vocabulary).
Khatzumoto's method (based on linguist Stephen Krashen's Input Hypothesis) is about getting a solid model for the language, which the brain builds naturally through constant exposure, before speaking or writing a great deal.
For more on these methods check out their respective sites. As an introvert I prefer the "listen first, speak only when necessary" approach, rather than "go out and make an ass of yourself from day 1" :)
[0]: https://ajatt.com/
[1]: https://fi3m.com/
No affiliation, but I have great respect for both, and have benefited from their advice tremendously.