I mean a lot of times these comparisons aren't wrong. It's largely the fault of game studios reusing the same game mechanics over and over. Because all three of these games are "Soulslike" aren't they? It is actually a repetitive formula for a game. You can almost instantly tell just from a trailer when a game is going to be a Soulslike. Have they tried a different camera angle? Maybe the weapons could work differently? Maybe the maps are traversed differently? It doesn't take much for a game to not be considered "like" another.
Every first person shooter is going to be compared, every 3rd person Soulslike, every 2d platformer, etc. Game studios could be a lot more creative with game mechanics and controls than they are. First person games are so similar that the Unreal Engine is built around that exact game. The demo game that the engine comes with, has a functioning first person shooter mechanic. There are asset flip games that basically just create a game mode and reskin the default Unreal FPS stuff.
Because all three of these games are "Soulslike" aren't they?
I never played it, but I think Ghost of Tsushima was a Assassins Creed style thing. My guess is the comparison is because of the feudal Japan setting for an open world game with slow, methodical combat.