Well, from Wikipedia his dad worked at a car dealership, but they lived quite well, with a stay-at-home mom, sailing lessons, and gobs of money on equipment. That sounds fairly well to do.
"As a child he was homeschooled by his mother, took sailing lessons,[7] and had an intense interest in electronics and engineering.[3][8] He took community college courses at Golden West College and Long Beach City College[5] beginning at the age of 14 or 15, and started attending courses at California State University, Long Beach[1] in 2010.[6] He wrote and served as online editor for the university's student-run newspaper, Daily 49er.[9]
During his childhood and teenage years, Luckey experimented with a variety of complex electronics projects including railguns, Tesla coils, and lasers, with some of these projects resulting in serious injuries.[1] He built a PC gaming "rig" worth tens of thousands of U.S. dollars[8] with an elaborate six-monitor setup.[10] His desire to immerse himself in computer-generated worlds led to an obsession with virtual reality (VR)."
What, middle class normalcy doesn't count, you're specifically looking for destitute children who went on to make millions? Seeking a Horatio Alger story? It's not exactly surprising that grinding poverty doesn't yield a lot of unicorn founders. Not sure why you'd think that was a reasonable expectation or litmus test.
