I didn't go to YC. My impression of YC is from news articles and hacker news. I believe that YC is good only if it helps you raise money.

Their advice is not worth it because advice is free on YouTube. Let's take PG; he often gives a lot of general and specific advice; he is a great writer and a fascinating mind. I enjoy reading his articles; they are outstanding, but they aren't any different from the many YouTubers giving advice. Unless you get personal time with YC staff, their services are not unique.

Do you need to be Peter Mckinnon’s apprentice to learn photography? No, likewise you don’t need YC.