So, you are OK with this?
Do you really think the DJT campaign does this, and do you really think the media would oblige if so?
My guess would be that this happens all the time. In an interview, the interviewee probably has certain topics that they affirmatively want to have covered. While that doesn't make up an entire interview, it makes sure that the interviewer gets to ask the questions they want to ask, but that the interviewee also gets to talk about the topics that they want aired.
And yes, I would think the Trump campaign does this. Do you
really think Hannity and the other FNC folks wouldn't oblige this for Trump? Frankly, if Trump was going into "hostile territory", don't you think one of the conditions of the interview might be that a certain portion of the questions were things he wanted to be asked, and the interviewer would oblige in order to secure the interview?
I think this is how the sausage is made.
Like CD says, this looks bad
because Biden already looks bad. If Trump or Obama did it, it might look like vanity. If Biden does it, it looks like he doesn't have the competency or quickness to answer any question he hasn't prepared for.