Are Iron Sights Obsolete for Hunting?

Why are iron sights so uncommon on bolt-action rifles, other than

Iron Sights: Are they still relevant to you? – SHWAT™

Wolf Hunting, Page 2 of 2

Big Game Hunting Gear, Page 3 of 6

Long Range Hunting on a Budget: Part 1 - Guns and Ammo

Do You Need An Optic On Your Turkey Shotgun? - Petersen's Hunting

Wolf Hunting, Page 2 of 2

Choosing the Right Iron Sight for your AR 15 Online - RailScales LLC

Coyote Hunting, Page 2 of 3

David E. Petzal Archives, Page 3 of 59

Do You Need An Optic On Your Turkey Shotgun? - Petersen's Hunting

Antelope Hunting, Page 2 of 2

Big Game Hunting Gear, Page 3 of 6