So you don't understand hoarding. Fair enough. Her son clearly understood enough and knows he isn't a butterfly race 2nd place winner.
Does she know you're on here telling others about her mental health condition and home, and trying to conflate it with stolen valor Walter Mitty's parading around publicly?
She has collected categories for lives she isn't living. She knows this and isn't pretending anything. They represent something in life to her brain, but aren't meant to imply a thing to others, unlike the Walter Mitty chap.
She doesn't think or pretend she's a grand 19th C estate owner, because she has acquired 20 soup tureens. She doesn't think or pretend she has created Hygge or Stil in her cluttered home, because she has collected and kept every IKEA magazine.
She hasn't acquired and kept the out of date food because she believes it forms a feast.
She doesn't think or pretend her son has won sporting events because she has collected medals and trophies for him.
She has her own MH issues, but it is unfair and not the actions of a 'friend', allowed into her home, private life and disorder, to conflate her private HD behavior or her son's acceptance or possible own HD, with this individual publicly passing himself as someone he is not, let alone doing it publicly.