One of the most wonderful things about video games is the amount of unique experiences you can have in them. A million people could play the same game, and chances are they'd all have a different special moment to talk about when asked them about what they played.
But this silver lining does carry a cloud. Because games are made to let players have unique experiences, this also means it's quite easy to miss some of them, meaning you can inadvertently sail past some of the most individual and wonderful portions of the entire adventure.
And sometimes this is intentional. As much as certain sections of a game are great, it makes sense that - for the sake of replay value - they're able to be skipped so you don't have to complete longer stretches over and over.
However, this doesn't make it any less frustrating when you realised you've missed a cool level or plot point, and you have to find an old save to access, or fully replay everything to see. You can even accidentally skip entire games this way - although mercifully, it's not something you can do very often.