In your opinion do these two sentences have the exact same meaning?
- John had a fight with Alex last week, I wish you had been there to stop them.
- John had a fight with Alex last week, I wish you were there to stop them.
How about these ones...?
- Mum fell down the stairs and hurt herself really badly, I didn't know what to do, I wish you had been here.
- Mum fell down the stairs and hurt herself really badly, I didn't know what to do, I wish you were here.
I feel like the second sentence implies that the person wishes that the other person was here right at this very moment, however they may not exactly mean that, perhaps native speakers tend to make this kind of error regularly?