Having your tongue against the roof of your mouth at rest is 100% the "correct" way to store your tongue. This actually influences how your teeth, jaw, and facial bones grow

That's exactly what I was thinking. My tongue rests on the roof of my mouth, to pull it back takes more effort. In fact, as I open my mouth my tongue sticks to the roof a little, then pops away - there's like a vacuum seal holding it there, effortlessly.

No escape from reality, tongue belongs up top. I went thru a similar thing.

I heard it has to do with what your primary language is. Different languages have different default mouth positions and so speakers of different languages end up with different muscles developed over time.

Maybe they mean excess force?

I believe your tongue is typically supposed to be in the middle of your mouth when at rest.

I'm going shove all my resentment over this incident into the ever-growing Ball of Repression in my chest instead.

My doctor called it "a symptom of hypertension" but that's because she's a dork.

Joke's on them I'm always unhinged

I read it as "release your ears" and was like "wait, what?"

Wisdom

Yes! I was like:

If you are reading this release, your shoulders —my shoulders what?! There should be a verb here! What does she know about my shoulders? What kind of press release is this? Oh, I give up.

(In my experience) Most people type the way they speak and people who carefully articulate themselves are outliers. Grammatically correct written English is also very different from the spoken word.

I get what you're trying to say. Unfortunately when the majority of what you've read is online is in spats of 150 characters or less (or whatever low character limit you're working with) and an even more substantial amount of what you've written is within those constraints... On top of most of your interaction with the English language being incorrectly spoken English otherwise? It's not hard to guess the end result.

This is something you can blame Twitter for. Blaming the user is odd, considering what they have to work with. Can't blame people for communicating the way they know how.

I'm sure there's more detailed advice in her book.

Scientifically it does though

At the risk of overanalyzing a tweet, this is actually generally good advice. Scanning your body to release tension is a common stress-reduction coping skill taught in therapy, and in clinical settings is often referred to as "progressive muscle relaxation", which has been shown in many studies to reduce stress in the short-term. If you google this term, you'll have better results.

Here's an NIH article that covers a few things, including progressive muscle relaxation:

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8272667/

It's not intended as a permanent solution for underlying causes (e.g. doing coke or alcohol, like you said), but more of something to mildly reduce stress/anxiety in the moment.