I learnt from this answer that the relative pronoun cannot be omitted in the following sentence:
I have a lived experience and I think one of the challenges with regards to mental illness compared to physical injuries, is physical injuries are easy to digest.
But in this episode of the Australia talk show QandA, an AFL player Wayne Schwass used this pattern several times. I just wonder if this is allowed and normal in daily life.
...because what I will say is what you've done is someone in that auditorium or hall is having the same challenges that they’re facing and your story has connected with them and they’ve probably got some inspiration out of what you’ve done,...