He's not conflating anything. He's asking a question that probably occurs frequently.I'm very supportive of immigration, but I'm struggling to understand the point of this MP's question. He seems to be conflating two issues, asylum, and family migration. Rather than helping, he just seems to have made it more confusing. From past experience, I don't think he's the brightest spark in the box.
Suppose an under 18 year old reaches UK, applies for asylum (which should be granted because they're under 18)
He/she left an area due upheaval and conflict. His/her parents were killed in the upheaval, leaving an orphaned sibling.
That sibling would need to make the same hazardous journey to join his brother/sister.
One could argue that the point of the MPs question was two fold:
To point out one of the problems and omissions in the current asylum policy, and
to highlight the incapability and ignorance of the current HS.