For me I don see any different between both, both are usually promoted and not one ads is above the other but it is just unfortunate that gambling warning tends to be more serious than alcohol. but i see it that people lose more money in gambling than alcohol. A drunkard may spent some bucks like $20 and got high and go back home, that is the end of his spending on that particular day because he may not take above what he has taken, but in gambling, a Gambler may never be satisfied with his win or lose he may keep losing and keep playing and chasing his loses till all his fund both in his gambling app and his bank is finished before he can leave and also he may be winning and keep playing to win more untill he becomes victimized.
I don't know why I think gambling and drinking are related to each other. Because many times it is seen that if someone becomes addicted to drugs, then in order to earn extra money for drugs, he gets involved in various types of criminal activities, among which he often tries to use drugs by earning money by gambling. Again, if someone becomes addicted to gambling, if he goes to gamble, he takes drugs to celebrate them and while taking them like this, he becomes addicted. Again, if he loses money in gambling, then he often takes drugs to hide his troubles.
To be honest, gambling and drugs are a threat to society. Because a drug addict cannot expect anything good from a gambler for society and the country.
Gamblers are indifferent to their families, resulting in unrest in the family, and drug addicts often destroy a family as well as their own bodies to earn money for drugs.