I don't take a stance on either from a morality basis.
In regards to gambling, I see it as a fundamentally predatory business model that preys on the people that are least able to afford it. If a rich guy wants to blow a million dollars on blackjack, I don't fucking care, that's not my problem. If a poor person is buying $500 in scratchers because that's they're only hope for excaping poverty, that's a problem. Or a retired person that pushes a button as fast as they can on a slot machine, burning through their retirement savings, because that's the only thing that lights up their dopamine receptors anymore. And there's a lot more of the latter two than the former. There are also a whoooooole lot of people with gambling problems, and a person that's blowing all their money on gambling ends up becoming a problem for the people around them, as they are no longer able to take care of their own needs.
The only issue I see with prostitution--aside from the fact that a not insignificant amount is from trafficked victims--is the public health risks. Given that healthcare in the US is outrageously expensive, there's not a great way for people that are usually working at a near subsistence level to treat STIs. And, for certain STIs (HIV, hepatitis C), they are strongly disincentivized in regards to informing customers, as there's not cure and long-term treatment is deeply burdensome.
did you know that Cocaine and Methamphetamine are not schedule 1 drugs
Yes. Cocaine and meth are both schedule II, which is used for drugs with a high probability of abuse, but still have recognized medical uses. (Marijuana is currently schedule I, but I believe that the FDA has been asked to re-evaluate it an move it to schedule III, which would make decriminalization much easier, and would mean that it would no longer be a prohibiting factor for buying a firearm.) Cocaine is--or was--used for surgery in highly vascular areas (esp. nose and sinus surgery) because it acts as a vasoconstrictor. Amphetamines used to be issued to soldiers, esp. pilots, that needed to be alert and focused for long periods of time. See also: Aimo Koivunen. The fact that certain drugs do have legitimate medical uses doesn't mean that the abuse/addiction is not a material problem. Try chatting with anyone that has been prescribed anxiolytic medication, and has tried to titrate their dose down, or discontinue their use entirely (same goes for certain SSRIs, TBH). Yes, drugs are a personal choice, right up until they're functionally not a choice any more because you'll suffer serious physiological effects from cessation. And it's not like the US has a great track record of providing effective assistance for people that want to get cleaned up. Full legalization or all recreational drugs, without also building the necessary social supports, would create far more problems than it would solve.