I don't think it's comparing them directly or arguing for equivalent seriousness. It is identifying a similarity of mindset where those who have their hands on the levers of power that could materially improve the situation act like there's nothing they can do.
But it's not comparing to school shootings, it's satirizing supposedly responsible parties who continue to deny responsibility despite repeated catastrophic failures which are their responsibility.
You’re right. Major supply chain attacks affect far more people than school shootings do, and can potentially cost more lives through downstream effects.
It’s 2026. Software is critical infrastructure for global civilization now. Lives and livelihoods depend on it working reliably. The “it’s just bits on a computer” quip has been outdated for 20 years now.