The "expert" clearly is not an expert
Ino is a sex linked gene. This means that males can carry two copies of the gene, and females can only carry one copy of the gene.
When a male has TWO copies of the gene, he will appear as a visual Ino. When a male carries only ONE copy of the gene, it will be "hidden" (we call this "Split" for Ino) and it will not show visually.
Since a female can only carry ONE copy of the gene, she will ALWAYS appear INO if she carries it. She can never be split for it.
So, in order to get a male baby INO budgie, mom has to be INO and dad also has to be either INO or at least split for INO. That way the chick will inherit two copies of the gene, one from mom and one from dad.
If momma bird is not an INO, then it is genetically impossible to have a male INO in the clutch. All INO's in the clutch will be female, since they will be inheriting the gene from dad who would be either INO or split for INO.
I really hope this all makes sense, sometimes it's hard for my brain to get my thoughts out in an orderly fashion.