Give a man a fish, he'll eat for a day. Teach a man to fish, he'll eat for a lifetime. Teach a man to use a vacuum sealer, he'll have so much fish he can afford to hire someone else to fish for him and still make a profit. See where we're going with this aphorism?
Nature abhors a vacuum. There's no such thing as a free lunch. Combine these two statements and you'll understand why a vacuum sealer is so controversial. But don't believe the anti-sealer propaganda! With your food safe and air-tight, it'll last longer, and you'll enjoy it more. Believe in the power of the vacuum! Believe, I say!