I have three Safari rifles, a Winchester M70 Safari Classic 416 Rem Mag, a Winchester Safari Classic 375 H&H Mag and a Mauser 98 375 H&H Mag. All three ware a Leupold lower power variable scope, Leupold quick release rings and mounts but, also have heavy-duty hooded front sights and sighted then pinned, rear sights. I have a second scope, a small, lite Leupold VX-3 1-5x20mm backup scope, in Leupold quick release rings, already sighted in at 100 yards, for each of these rifles. These backup scopes, with rings installed weigh less than 1 lbs. and I always care one in a hard case when I'm packing in for more than a days hunt. Still, in the field it is a great feeling to know that should my optics fail or get damaged, or conditions such as heavy rain/sleet or body steam condensate inhibit use of my scope, I can very quickly and confidently revert back to my iron sights.
Many of my other hunting rifles have iron sights as well. All my iron sights, except for on my safari rifles, are sighted in at 200 yards. Personally, I'm more likely to buy a hunting rifle if it has good open sights.
Yes, I have a lot of rifles without iron sights and yes, I do hunt with them but, those only get used when I have one of my proven backup rifles close by. I carry a second, sometimes even a third rifle as a backup on hunts, whenever possible. I certainly have not lack of rifles and caliber/cartridges to choose from.
My eyes may not be what they used to be but, I can still kill a deer or a coyote with iron sights from a halfway decent rest or bipod, in most conditions, out to 200+ yards.