Why romantic literature no longer deliberately highlights human rationality, while neoclassical art highlights rationality?

These two literary forms are different in time. Their appearance corresponds to the philosophical trend of thought in Europe at that time.

Romanticism is a little later than neoclassical art.

Neo-classical art rose with the wave of rationalism accompanying the Enlightenment. Corresponding to rationalism, it began at the beginning of18th century and took shape in19th century.

Romanticism began in the late18th century and swept through the middle and early19th century. During this period, philosophical thoughts began to dislike and advocate rationality, and philosophical romanticism rose. Reflected in the literary world, the corresponding romantic literature strongly advocates personal feelings and experiences, writes everything that can be written and describes all personal feelings that can be expressed.

Personally, the difference in artistic forms is also a reason. Literature can quickly reflect the great changes in human thought, while art is slower. This feature can be seen from the great artistic changes in the 20th century at the end of19th century, which is really a beat behind.