Yes, and, if you're grilling meat, do you do less harm grilling it on an electric grill or a fossil fuel grill?

Every change for the better - even a tiny marginal change like replacing a fossil fuel grill with an electric grill - is worth doing. Every time someone makes a decision based on the environment, they become more likely to make future decisions based on the environment. Especially if they get positive reinforcement for their decision instead of discouraging "this doesn't matter" or "you should do something else instead" responses.

(Yes, it would be better for the environment, and for people's health, and be the morally correct thing to do, to grill veggies instead of meat. But cultural dietary changes are a lot harder to make stick than swapping out a piece of equipment. And any change is better than none.)