In my opinion risk and excitement are related concepts. If a gambler takes risks it would be strange if he would not experience excitement. Of course there are people who have individual peculiarities of psyche - they can worry much less than the average gambler. Some even use alcohol to hide their excitement. But in my opinion alcohol and gambling things are incompatible because not calculated with alcohol can lose more than originally planned. Experiencing excitement during a gambling session - it is quite normal.
Oh God, excitement can be achieved without risk, the fact that people need real risk to feel excitement is a psychological problem in my opinion. Those who need excessive risk to get a dopamine rush should think about the reason for this, it's not healthy