this is the most annoying thing you can say regarding ygo tbh, it's literally the only joke people have about it, equivalent to telling the cashier you just printed your money that morning. It hasn't been funny for years, if ever
Legacy of the Duelist is not a very good dueling simulator imo, it's very slow especially summoning animations. Turns in a lightning-quick sim like YGOPro can still be multiple minutes when someone's playing a summon-heavy meta deck, so I can't imagine how long it takes on LotD.
That said, games like that may still be the best way to experience YGO now. Tag Force is really good but the World Championship games on DS are the best for how you get access to new booster packs in a linear fashion to power up your deck against the game's increasing challenges.
As I mentioned earlier, if you want access to all the cards as well as online multiplayer, then YGOPercy is a really good free simulator. Biggest issue is how many netdeckers there are. There's also DuelingBook, which rather than being automated, simulates the experience of IRL Yugioh. It doesn't have programmed effects, you move the cards around yourself.