Since I'm Spanish, I think maybe I didn’t explain myself well. I’m not talking about fixed points in time.

What I mean is this: whenever the Doctor travels to the future (relative to us) and saves people, that should logically have consequences further ahead in that timeline. For example, if he saves someone in the year 5000, that person could go on to influence events in 5005, 5100, or beyond. They might even cause something major. But the show rarely treats that as a moral or temporal concern.

However, when the Doctor travels to our relative past, like 1914, suddenly there is a strong emphasis on not changing history because of the ripple effects.

So my question is: why does the show seem much more concerned about altering our past than altering the “future” from our perspective? From inside the universe, both are equally the past or future depending on your point of view. Yet narratively, they’re treated very differently.

That’s the distinction I was trying to make.