Why do adds lie to us and present statistics as facts?

I know that normal product commercials lie to sell things, but why do anti drinking and driving adds lie? I saw a poster that said it's a fact every year x amount(I can't remember the exact number but it was like 400,00 something) of people are killed in alcohol related deaths it didn't say about this many people or something. that's not a fact its a statistic and there is no way it's the same amount every year it has to change year to year, so why do they say it's a fact? why don't they just say approximately this number of people. I have seen the same thing with anti tobacco and other anti drug adds and posters and ant child abuse adds. I saw one poster that said one out of 6 babies is abused. how would they even know that? Yes drinking and driving is bad and smoking is bad and child abuse is bad, but i think that the adds and posters would be more effective if they were truthful and not just estimates or statistics paraded as facts.