Does my Echo really need a heat sheild?

I had my car in for some work, the heat shield clips are completely broken off so there's not way to keep it from rattling, the mechanic got a second opinion and they decided to just remove it, saying the gas tank is made out of steel, so it won't be affected. Is the mechanic right and the car is fine... show more I had my car in for some work, the heat shield clips are completely broken off so there's not way to keep it from rattling, the mechanic got a second opinion and they decided to just remove it, saying the gas tank is made out of steel, so it won't be affected. Is the mechanic right and the car is fine without the shield on?
Update: Yes to my car needs a shield, or yes the mechanic is right?
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