Just my own experience and observation, online casino games are not worth the time. Rather play poker or ber sports, bu not this nonsense.
I feel casino games are only worth it for the fun aspect and shouldn't be thought of serious money making tools since the house edge almost always wins in the long-term. Poker and sportsbetting involve skill along with luck.
This makes them automatically better ways of earning serious money as you mentioned. This is all common sense basically.