This wasnt a time trial. I think he meant that at for speed he had to hold in this race he expected to feel very good (and be able to push the pace further) at 800m.
Geez, the quote about his dad is sadder than anything else in that interview. Gjert is sick (supposedly) and he just doesn't give a crap?
That is a weird interpretation.
Here's another:
A person with class doesn't blame failures on a parent's illness. (If you can call WC silver a "failure".)
That does not mean someone "doesn't give a crap."
Guess I have to spell it out more clearly, but the Ingebrigtsens basically told Gjert they didn't want him to coach them anymore, and apparently Jakob had nothing nice to say about it