Not sure I believe this. Instagram could’ve conceivably killed Facebook a decade ago if they’d chosen not to sell. Reminds me of Steve Jobs talking about Microsoft bringing about the dark ages of desktop computing: https://512pixels.net/2010/05/the-desktop-computer-industry-....
Then the question becomes whether Instagram would’ve become Facebook if they kept going. I believe they would have once they hit Facebook’s scale.
Ironically, I believe you could take that Jobs quote, swap Apple for Microsoft, and you’d be talking about the mobile industry. I doubt I’m even the first person to observe that. You really do become the villain if you gain enough market dominance.