Hi Shreckmeister,
I can only speak for me. I view my contemporary longrifle as both a piece of art as well as a fun, functional firearm.
I am over 50, and my eyesight is slipping (not terrible, but not great). I have to use a set of specific reading glasses to see any front sight. I have a bag of glasses, and try various ones until I can see the sight. I have done a lot of open sight handgun shooting over the years, and barrel length corresponds to eyeglasses strength for me.
My rifle came from the respected builder with small, very low sights. I am working with them, but it is a struggle. Round topped front blade with very low rear with small round notch. It looks HC, but is a real trial for this goober that grew up shooting with target handgun sights (a bold square post in a square notch with light to each side). I couldn't get off a shot at an animal in the field with the small low sights. It would take me way too long to draw a bead.
I am not sure if you have done open sight shooting with handguns? Folks roundly ridicule sights on guns such as the standard Luger and original 1911 Government. Those sights are way easier to use than a HC longrifle sight, IMHO.
I am not promoting a historical longrifle with big Thompson Center adjustable sights. However, if the rifle is going to be used, I think there needs to be a happy medium.
I guess a lot of longrifles are bought, set in a safe or on display, and never shot. The function of tiny, low sights really doesn't matter there. Like a mint restored Bugatti, does it matter how it runs if it is on display only?
Me? I want to shoot mine, so the sights make a HUGE difference. The old days? If you don't know what better sights look like, you work with what you have.
Best wishes, Marc