Are orphan pages bad for a WordPress website?

Are orphan pages bad for a WordPress website?

Orphan pages are not good for users and crawlers both. Because users can't access those pages through the natural structure of your site, any critical or valuable content on those pages is wasted. This can lead to an unfavorable user experience. (google)it means

• delay
• security possible problems
• bigger site
• holes in sitemap
• maybe more