Even experienced users often say something like “There are no smart strategies in gambling, it’s all about chance. Play only for fun, not to win.” These posts look like they were written by artificial intelligence. First, let’s distinguish between casino games, which are entirely based on luck, and sports betting (and betting on non-sports events, such as elections).
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Then we should define the thin line between being experienced and being wise.
For someone to be experienced doesn't mean the person can think or express himself well, so I do not blame them. However, what I am certain of is that sports betting and other betting kinds like elections, market prediction and others still allow you to showcase your expertise, so it's certainly not dependent on luck entirely.
Fine luck will still play its role at times, but we can't compare it to the needed luck in casino games that work just as the house wants it.