I thought it opposite according to the guideCarlaganda23 said:Hi,
it's not mandatory but it shows you have a higher chance to get nominated! it's under employment and settlement issues..
When Not to Apply
...
"a grand-parent, parent, spouse, common-law or conjugal partner of a Canadian citizen or permanent resident living in Canada, an applicant under humanitarian and compassionate grounds, a refugee claimant or a failed refugee claimant"
Could you precise with NS Office whether such a ties are advantage or vice versa?