Have to disagree. Yes, every experienced dev can probably pick up any other language/framework and be able to work with it within 6 months - things aren’t fundamentally that different.

But these people can easily switch jobs and it’s doubtful most are ok to hitch their wagon to Flutter - a nascent framework with basically no crossover to web development and a big company behind it, known for killing its toys on a whim.

Much easier to just go do RN elsewhere.