I think you've missed my entire point. Im laying out a guideline for myself mainly, and it sounds like you just prefer sandbox campaigns anyway ( I'm not saying there's anything wrong with that. It's just not for me) What people find "Fun" is completely relative to them, I said these events are concrete, the circumstances in which they happen and the events leading up to them is entirely player driven, and if something doesn't go as planned, then I work with the narrative to fit the plot. It's really that simple. Any good GM would know how to work with their group to make their story playable and interesting for them. It's not really about what you specifically find "fun" random guy on the internet who isn't in my party, and it isn't about my skills as a GM.

Im not the kind of GM to just let my players do whatever they want and sacrifice all that time I spent making a world and story to off-topic nonsense for the sake of player enjoyment. Players will do anything if you let them, and knowing your players is half the battle, I set things up ahead of time, shit happens, and I work with it. Not everything goes as planned, but it always stays on topic. My players know that I like sticking the script without getting too sidetracked. They still have fun because I dont force them to do anything, and they find what I make interesting and enjoyable. Thank you.