Spoiler alert - it wasn’t. You’ve cherry picked 5 movies from each era out of thousands. There’s no reason to choose these movies instead of others. While the biggest blockbusters are more likely to be remakes or sequels, there’s no shortage of interesting movies.
Just from last year, original films that weren’t remakes or sequels and blew my mind - Parasite, Knives Out, Soul, The Father, Hamilton, White Tiger.
Best part is, we’re living in a time when you have practically unlimited entertainment a few clicks away at absurdly low prices. It’s easy to find something that suits your particular niche if you just look. That wasn’t the case in previous eras where studios had to pander to the largest audience possible.