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No, but maladaptive coping (eg addictions, including eating your emotions) can be replaced with something healthier. It's also possible they've been emotionally neglected or abused (trauma always makes these things much more messier to address without addressing it first) and that's how maladaptive coping develops (or maybe they never learned them from parents for another reason, or maybe they picked up on a parents unhealthy coping style).

Not even remotely a doctor, so take all this with a grain of salt if you're in a similar spot. Mostly based on my own life experiences and having to work on childhood trauma and what that entailed in my case (food addition being just one amongst many maladaptive coping mechanism).