Dude you said age at ITA is considered which is wrong. The points decrease after age change.https://laws-lois.justice.gc.ca/eng/acts/I-2.5/section-11.2.html?wbdisable=false <--- Official immigration law
"Despite subsection (1), an officer may issue the visa or other document
...the foreign national did not meet the criteria set out in an instruction given under paragraph 10.3(1)(e) — or did not have the qualifications on the basis of which they were ranked under an instruction given under paragraph 10.3(1)(h) — because the applicant’s birthday occurred after the invitation was issued..."
Not sure where you got this "discretion" thing.
And then google the difference between may vs should or will.
Your poor English comprehension is not my problem. Go get a life.