For Gambling, I can choose other games as well. There are a bunch of popular games that I can try without actually knowing how it works. I remember I started playing slots without knowing how it pays.
There might be many gamblers who don't know how it works but like to wager over particular slot so it doesn't matter a lot because we just want to see how much lucky we are in that bet or say in gambling.You just pick a slot like when we try new one we don't have idea about it but when we start playing we know about it and build a taste for them.But all is dependent on luck in these slot based games.
In general, you don’t need to understand the full mechanics of the slot since it will display automatically on how you win every spin. Bankroll management is the only thing players needs to consider on playing such games. As you mention already that slots is a luck based game. It’s still important to choose a that have a good RTP to make sure that you will have a bit of advantage since a 1% to 2% difference on RTP can give a huge impact if you are playing long game.
Popular providers sometimes decrease their RTP since they knew that many player plays with their slot even if they adjust a bit the RTP. Normal players won’t notice the changes due to excitement so make sure to keep an eye on it.