I believe it's OK for the user, especially us plebs, to treat the act of gambling more seriously and as a business. It will make us lose less, give is a higher probsbility of winning, and reclaim back some of the advantage the casino over us through house edge. BUT I also have the same opinion as yours that it shouldn't be about "the highest RTP", or "the best daily/weekly/monthly rewards. It should be more about to choose games to play, and the strategy in how to play them to lower house edge. The profit will come by themselves through consistency and good strategy.
If you mean treating it more seriously, like we must implement a strategy and carefully budget our bets then yes that is necessary if we are playing for the profit but we should keep in mind that the house are still more in favour than us, so it is bad to totally depend on gambling and treat it as a source of income.
Many plebs acted like this, making them stay as a pleb. The one that has the right to treat gambling like a business are only the gambling owners. If we are a slot player then it's about the RTP that matters aside from the theme but for the typical players, it was the rewards and bonus. While for you and me, the first thing that we look at are the games.