Language Acquisition- Bad advice review

I have come accross quite a few suggestions recently that while I accept these people are trying to help, I feel some responsibility to point out that what they are offering is bad avice.
#languageacquisition
#languagelearning
#learnenglish

Dr Garcia's video
https://www.youtube.com/watch?v=3Y-tE9KKWT0
Twitter
https://twitter.com/PhatThor13/status/1606104534484402176

Second brain
https://www.youtube.com/watch?v=y8jJKW9DU3c&t=209s

I couldn't find the final video about everyone learning languages differently.