OK, so you accept without question an ordinary, human use of “father” even though it’s not exact in this case, but you insist on the modern American, non-tribal (for want of a better term) use of “brothers and sisters”!
Geez, anything but admit that Mary had sex and Jesus had brothers and sisters.
There’s nothing like sibling rivalry to test the quality of one’s character (He was tempted in every way, just as we are, yet was without sin).
Being raised as a single child by an (allegedly) perfect mother, is the most unrealistic scenario imaginable.
No way He could have fully participated in our humanity under those circumstances.
I can just see His brothers and sisters setting Him up for the fall after hearing enough of *(Fill in the blank with name), Why can’t you be more like Jesus. He always does what I ask without complaining.*
That’d be worse than living with someone with WWJD paraphernalia hanging all over them.