You said it, instagram is not life-critical

Someone being able to take over your account, read your DMs, and impersonate you is pretty serious. Should be treated as a data breach with serious penalties.

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Sure, but it's not life-critical, lives don't depend on it.

Other engineering disciplines have different rules, because for example a bridge or building with a fault might cause the loss of life of hunderds of people.

Another commenter noted that stalkers and ex partners could absolutely weaponise account takeover in a life threatening way.

Tech companies don’t want to take responsibility for the incredibly sensitive data they have collected and are trusted with guarding.