Designers of the era and subsequent eras decided that overall visibility was a higher priority than aerodynamic advantages achieved through the "flat nose", and hence the conventional pointed/stub noise design dominated aviation
A lot of the requirement for improved visibilty resulted from the Grand Canyon collision where a TWA Super Constellation climbed up into the underside of a United DC-7 in good weather.
The Caravelle and Viscount required a redesign of the cockpit windows to meet the new American certification requirements.
Advances in technology such as TCAS has relaxed these rules a little - hence the deletion of "eyebrow" windows from the 737 and 717.