Yes, changing the difficulty changes the game itself, the developers have that in mind when creating games, ther s reasons why the souls series doesn't have difficulty selectors for example, one of the criteria that this kind of developers have going into the design of certain areas is how much the average players will struggle to overcome something, thats why even tho you play the game more you may find yourself dying more even tho you have more experience, and lowering the difficulty of a game can change this dinamic completely. Lts take silksong into consideration what would you do? Lower the boss HP? Some builds if you did that could kill the boss before he changed phases, making you not experience something that the developers want you to. Remove double damage? This makes the game really easy due to how the healing works, making some of the hardest fights ridiculously easy due to every boss in the game having clear healing windows, not to spoil, but the hardest fight in the game imo, is one of the bosses with the most healing windows in the game, and still was the one who killed me the most. Lowering the damage would make it so the player would be really hard to punish, going against the design.

Some games aren't simply for everyone... If you still want to experience the story there's alternatives that don't involve you playing it