Sure. It doesn't mean we're not allowed to moan about it though :)
And you've basically highlighted the problem with modern AAA games and their bloated budgets: they take a popular 'template' and run with it to reduce risk. And then everything is simply a variation on a theme.
By all means, moan away :)
I agree with that, but I also think that's a problem in every sector of gaming, not just AAA. The indie equivalent of Ubisoft style open worlds would probably be metroidvanias and roguelikes (I say this as someone who loves metroidvanias and likes roguelikes ok).
It's also a just a problem with any business in general. Businesses will always chase the trends that are proven to be successful. After the MCU started making an insane amount of money, you see all sorts of other film studios copy their interconnected template (WB with the DC movie universe, Universal with the Monster movie universe, etc.)