My wife asked me why these ships have such blunt bows. I tried searching this in Google but I can't get by modern bulbous bows. So why did they have such ugly bows? (Her words but I kind of agree )
On warships a more bluff bow, above the waterline allows for a broader deck, further forward, which translates to greater working area for the guns. Underwater, though, the junction where the stem and keel meet is usually pretty sharply hewn.
Just evolution of ships. The first schips where mostly used by fisher men and have these dull form. Like a botter. From there they evolved to galleons and later on they learned to make ships like a clipper with a small bow.
The bluff bow definitely sacrifices speed for stability. Eventually, navies came around to creating moderately well-armed cutters that were sharp in the bow for speed and maneuverability.
Drachinifel has a nice discussion of naval architecture on his YouTube channel. Here is the link:
, If you don’t trust the link just search Drachinifel on youtube and look for lHull Form Design”. lDrach“ is a naval historian and does deep dives on all things nautical.