> "Lie" might be a more appropriate word than "myth"
This whole line of thinking is why stories like these get great engagement on social media and never really lead to any changes in behavior. A debate over whether omission or generalization are forms of lying gives you a fractal space of debate that's easy for non-experts to opine on. So go the articles to the top of the voting-based social media algorithms. And yet nothing gets done.
As a non-expert whose only dog in this race is living on this planet with everyone else, I'd urge you to stop speculating on solutions. Look at people or movements that it seems everyone agrees with, especially across political divides. It's not going to be this really arcane stuff you're talking about, like shipping containers or whatever.
Take electric cars for instance. Driving is this thing where everyone agrees they want to do it but they all hate other drivers. It's a unique political situation: agreeing with people that you should drive, and simultaneously hating those people! Electric cars give people what they want in a way that despite hating each other they'll agree, and if you pay attention to what environmental solutions (particularly technology) actually gets adopted, it tends to look like this.
In your example, you're basically talking about something like electric cars, which is good, but then speculating you actually know what the packaging solution would look like, which is bad. People have even speculated about electric cars for a century! But if you really thought this was what the solution is, go and do it. Go and make those standardized boxes and try to sell them to Amazon.
It's not about being right or wrong even though it feels that way. That's an illusion created by social media. Elon Musk's worst moments are when he's going into crackpot conspiracies. The reason he's beloved across political divides is all about going out and doing shit. But you ain't that guy, you don't have a billion dollars to transcend feeling good on social media.
So you don't need to speculate about "garbage manufacturing industry" conspiracies or why Amazon does this or that. Go work for Amazon and create new packaging for them, or tell them what you would pay for, or support people who actually go and do the thing. But don't just click upvote and feel good.