What do you mean by "only gets you so far?" Opinion, experience, or do you have some evidence?
Homeschooled kids can get high school diplomas in most states (all three of my kids did), and get into college (two of my kids decided to go to university, and had no problems get admitted). In the group of ~30 secular homeschooling families I belonged to when I had school-age kids, many of the kids went on to college, got jobs, and turned out just as functional (if not more successful) than kids who went to public schools.
Homeschooled kids can get high school diplomas in most states (all three of my kids did), and get into college (two of my kids decided to go to university, and had no problems get admitted). In the group of ~30 secular homeschooling families I belonged to when I had school-age kids, many of the kids went on to college, got jobs, and turned out just as functional (if not more successful) than kids who went to public schools.