If they had a point, they wouldn’t have to lie.
They know they are wrong because they know they are lying.
“Gun Control works” for them means that very few people have them, the government has said that no more are allowed to be added to the stock, and they cannot be legally transfered to anyone else without a costly and time consuming process controlled by the government.
The legal numbers have been artificially held to an very small percentage of the population, by various inhibitory regulatory mechanisms.
Yes, that is what the disarmists want and expect from “gun control”.