I'd like to inquire @ a companion query: why no pics of him in the HBO series, "Looking"? Love the NCIS NOLA pics, suggesting some recent/current stuff is making it on here, but not Looking. Hope this isn't due to Scott's character being openly Gay!! One of the things I LOVED @ Quantum Leap was his awesome portrayals of women, Gays, African Americans, disabled, . . . That aspect of QL was definitely ahead of its time! ?

Well, what a ray of joy and delight you are! NOT. It may be true that my idol may not like me, I strongly suspect that there is not a soul in the world who would like you. You are blunt and insulting and entirely without any grace. Learn some manners.

You're both wrong.
ANYONE can add or edit a bio. No one manages specific pages. The name of the person who wrote the bio is clearly displayed.
Usually the only time the actors write the bio themselves (or have a relative do it) is when they're just starting out. Same with publicists. They tend to write stuff for lower level actors they're trying to promote. Once an actor is known, there will be no limit as to the fans willing to submit a bio.
If you want to add to a bio or create one, you don't ask on imdb. Just do it yourself. It will take a few days for imdb staff to approve it. Personally, I don't see the point of adding newer credits to a bio. Just look at the credits page if you want to see what they've starred in.
The people you idolize wouldn't like you.

Whilst I agree that there should be more focus on the wider and newer body of Scott's work, I don't think that you can order Scott to update this page. I don't even think his publicist does it. I may be wrong, but I believe the page is managed by a member of IMDb, and someone who is a fan. He/she may be otherwise occupied.
I was also not much interested in watching the NCIS franchise, and only watch the NOLA version regularly, and that's because I am an adoring fan of SB. I now do sometimes watch the other shows, but I don't go out of my way to do so. I think the NOLA version is superior except that the writing leaves some huge plot holes and the dialogue is a little clunky.