The answer to the author’s question is simple: “Make a rational argument.”
But a better question is: “How do you get progressive leftists to BUY A FREAKING CLUE?”
Even better....”Make a product that ppl want.”! Offer some personal benefit that appeals enough for a person to decide “I want this, not that.” when they’re in the store looking to purchase.
If a product doesn’t have any pluses that make at least a segment of the population look at it and realize that it fits their needs or wants, it need to die.