If it helps any, there are loads of
very successful people that you'll never hear about who grew up very poor or modest and have very much "made it". Not being a public figure is not the same as not being successful.
The very first multi-multi-millionaire I ever met grew up desperately poor. Quit high school in 9th or 10th grade. Tried to become a boxer to escape crushing poverty but didn't have the right build for it. Ended up in construction where he learned to become an electrician.
He started a small contracting company doing electrical work on new construction and now has three generations of his family and a few hundred employees working for him.
As an aside, he has substantial real estate holdings, raises race horses for a hobby (actually he lets his wife do that), lives on a beautiful 50 acre estate with multiple guest houses and a private car collection spread across half a dozen large garages that's got to be seen to be believed and has vacation homes in the places you'd expect people to have vacation homes. He has a skybox at the local football team stadium etc. He's toyed with getting a 100' yacht, but doesn't much like boats.
He's also completely unknown and if you were to meet him you'd think he was a retired ex-boxer construction worker -- real blue collar stuff. Dresses in work clothes most of the time and talks with a bit of the slang that was common when he was young. A google search for his name brings up nothing. His sons and grandkids are all similarly down to earth and work for what they earn and not a one of them would be known outside of the circle they work in. His sons are all at least double digit millionaires, even though they've split the company 3 ways between them.
Another family I know, immigrated from Korea, the father opened a small deli (one of those NYC style by-the-pound places) and his sons all grew up in the family business. The oldest son cottoned onto the family business and grew it, moved it to a better location. He supports his father in a very comfortable retirement, lives in a multi-million dollar 6000 sq ft home in a city next to apartment buildings (so you can guess what the property value might be), his two younger brothers all work at the family business and all live in very comfortable homes. He also has a pretty decent real estate portfolio and is planning on opening up at least 3 other delis in the next 5 years and perhaps building up a brand and franchising them out. They aren't "mega" rich, but they're top 1% in the U.S.
One more.
My father-in-law grew up an orphan at the end of the Korean War. Didn't even finish his 6th grade education. He managed to get ahold of some property and some investment money and flipped it and made some money. Repeat a few years, with more expertise, and he made a tidy fortune for himself. He single handedly supported himself, his wife, 5 kids (all through college), his brother and his similarly sized family...without going into too long a story, he vacations half the year out of his retirement and spends the other half playing Golf...in Korea. He also lives in a multi-million dollar, custom architected showpiece house near Seoul. He's also not findable on Google.
I've since met dozens of other very successful people like this, yachts, vacation homes, private castles, private islands. Not a one of them would be known outside of their immediate circle. Many of them self-made, not from old-money, didn't go to top-tier schools (if they went) and are otherwise successful by any reasonable definition of the word.
Don't confuse "publicly well known" with successful.