I haven't read the article but based on your quote:
"While that possibility cannot be ruled out, it cannot be confirmed. The fact is that there were many conflicting interpretations of the 70 weeks in Jesus’ day"
It is simply saying that one can not say what they believed back then. Nothing controversial about that.
We get the formula from Daniel. 483 years ends in Jesus' baptism, then the last 7 years, half the week was his death, then it fully ended in 36 CE.
It adds up. Nothing controversial about this prophesy and fulfillment at all.