Site structure splits into two: 1) Silo structure — posts are under the category (Shoes/Men > post). 2) Hub & spoke — posts are in a separate /blog, linked to the category. Which one you choose depends on the strategy.
Silo (posts under category): Ideal for e-commerce. Posts boost category authority. Downside: the main category page can get cluttered.
Hub & spoke (separate blog): The blog builds its own authority. Downside: less link equity passed to the category. Silo is better for e-commerce because you want to boost the sales category.