The author visited the shop so infrequently because the boots made by Mr. Gessler were of very high quality and lasted for a long time. Due to the durability and excellent craftsmanship of the boots, the author did not feel the need to buy new ones often, resulting in infrequent visits to the shop. Additionally, the author ordered many pairs at once, sometimes out of sympathy for Mr. Gessler's struggling business rather than personal need.