Right or wrong, this stuff happens every day, and when you could tie in a match there was more of it. I feel its wrong, but if I were to play my daughter, wife, or sons would I give them the win? Chances are that wouldn't even be an issue, but if it was, I sure would.
Face it life is not fair, and it never will be, to build on this, look at the parent child, the sibling vs sibling, spouse vs spouse, and team play matches. compound this with smaller non-podded events where people play out of their age group.
In our smallest BR, Anna had to face her brothers Alan and Chris, Kathy, had to face her kids, another dad had to face is 6 year old.
Anna beat Alan, did he let her win? Maybe, but her toyed with her I'm certain, and in the end may have, but he wasn't going to just tell her, Chris faced her in round 3 of a 3 round event, he was going to win, there were no playoffs, but he sat down and conceded to his younger sister who would have come in second had she lost.
Do Chris and Alan play tough against Anna's competition, yes.
Was it fair that she got that win? Not to Chris who gave up his win, or to other players, did the dad let his 6 year old win, he sure did, was that fair to the other Juniors, no.
Do parents let their kids win? yes
Do kids let their parents win? sometimes if it will help them.
Is it right for Mandy to let her friend win no, but I guess they just have to accept it.
I know this is a twist on this subject, but in many smaller events, the winner of a younger age group may depend 100% on being paired with a family member or friend.
Some of what I added in as examples would go away if we never did cross age pairing, the rest, we will just have to accept it, even if you were to make a rule against conceding, it would be impossible to enforce, you just throw out a single pokemon, leave it there to die!
Should somone who has accepted a position on staff at worlds be able to play in an event with family or friends? Do these people give wins to their players? Sometines they do.
Older players are giving up their chance to win all the time because they have a soft spot for younger kids in cross age paired events. Point are not really an issue, but cross age paired events are one of the flaws in the current ranking system.