Unless they work on many different WordPress sites, across multiple industries, they won't have the same experience and expertise that we do. Since we work with hundreds of clients, we see patterns emerge (such as hearing about a new bug in a plugin update -- and waiting to run updates until it's resolved). Moreover, your husband/nephew/brother-in-law could probably be more effective spending their time helping you with other technical aspects of your site, such as search engine optimization, social media outreach, or building that online course you've been wanting to create for years.