I am not saying it is impossible. This is the advise from my lawyer who has been involved with GV since 2012 and now applying permanent residents and citizenship for many clients. The law is vague here, about the Portuguese ties. And she advises that living in Portugal/ being educated in Portugal is obviously a very strong tie. She mentioned also attending a Portuguese school in your home country can also be a tie.
But laws can change. It can be tightened and loosen, in 5 years time, who knows. Golden visa is new, meaning the number of people who are eligible to apply for citizenship after the GV is very few. Those who has applied and got the result are even fewer (just the approval of citizenship takes 1-2 years). And maybe SEF will eventually consider passing the Portuguese language or staying here a few weeks is considered enough tied to Portugal.
For the issue of getting citizenship for your dependents without going thru GV, has to be careful. There is a difference between born as a Portuguese or becoming a Portuguese through naturalisation. And a difference if a child is born before/ after you have become a Portuguese citizen. And a difference between if you are living in Portugal or not. There are so many scenario here. My advise is not to assume. It is better to confirm with a lawyer.
Also, the GV is a residency status, there is value in it. We can’t see citizenship has a value of 100, while GV has 0 value, is just the means to get the citizenship.
For instance, like this pandemic, entry to the country is restricted/ limited for a foreigner during certain times with the confinement, but as a resident, you can enter the country. Meaning if something happens you need to leave your home country and come to Portugal, all your family can come if they have the residence permit. I think this (to ensure that they come and stay in Portugal without further formality in case anything happens) is what most people who are looking into GV want, right?