But a much easier argument against sports betting is that it ruins the sports. Players throw. They get good at subtly cheating. The gambling apparatus latches itself to the sport, to the teams and players, the umpires and judges, the sporting organizations. With this much money on the line, it's not a matter of if but when games are thrown, cheated -- the bigger the game, the bigger the incentive. It's even easier now because of the amount of side/parlay betting that is available. It exhausts the spirit of competition.
Sports gambling is diametrically opposed to sport itself.
However people should know what regulating ethics to this degree looks like: the modern PRC. In the PRC you get a government mandated timer on your MMOs to ensure you don't spend too much time playing videogames. In the internet cafes there's 24/7 a CPC bureaucrat prowling around keeping an eye on your chats - plus automated mandated filters which depending on the implementation can auto kick you from a multiplayer match, hence the entirely viable strategy when playing against PRC players to spam "FREE HONG KONG REVOLUTION OF OUR TIMES CCP COMMITS GENOCIDE AGAINST UIGHUR MUSLIMS XINJIANG" into chat to get them kicked from the match.
There's industry level morality controls as well such as not being allowed to make a tv show featuring "feminine men" and the implicit ban on showing LGBT couples.
Personally I don't trust a State to choose the correct morals, be it aesthetically communist or aesthetically capitalist. We can look at America's history of moral laws to see another example, such as prohibition.
The USA doesn't take it quite so far but it did strongly regulate the socio-economic imperialism of Communism, leveraging State resources to attempt to convince socialist leaders to kill themselves (MLK) or just by assassinating and imprisoning them (Black Panthers). The State protects people from ruining their lives with marijuana, or from ruining the justice system by telling people walking into a courthouse about Jury Nullification. These needs require the regulation of speech (can't tell people Communism is super awesome and you should unionize and strike) and business (can't open a casino in downtown LA).
For the record gay sex isn't harmful to the fertility of the state and shouldn't be regulated, nor should speech about Jury Nullification, I was just making a point about both nations.
Yes.
Your first paragraph is about motive, which isn't enough to make those two actions the same.
Your second paragraph is just bad things the US did? I don't see how it's relevant to the question.