You're posting someone's "opinion." What needs to be looked at is
the actual law in effect at the time of Cruz's birth. The 1952 law Sec 301 Subsection that applies to Cruz's birth doesn't permit "at any time" prior to the birth qualification, as it does in another Subsection that doesn't apply to Cruz. Cruz's mother was a resident of Canada for three years
prior to Cruz's birth, so Cruz doesn't qualify for US citizenship at birth.
Words matter.
Just like 'born citizen' does not equal 'natural born citizen.'