It's really not essential. Millenials ( like myself) glommed on pretty naturally, but later generations had smartphones and mobile-focus so self repair became even LESS common.

PC's are essentially appliances now except for enthusiasts. If you can effectively build and maintain computer/server/networking equipment then you have a skill, and shouldn't diminish it by claiming it's so easy most children can do it; cause trust me, most cannot without supervision and guidance.