You know, whenever someone asks me this, I still have to stop and think. We've been homeschooling for so long now, the questions for me is "why would I ever put my kids in school?"
While some of my reasons for continuing are the same as when I started, keeping on with it has led to new & better reasons for continuing. Especially now that 2 of the 4 are adults.
I live in a province in eastern Canada where we are typically economically depressed. Most jobs are blue-collar. A government job is seen as the pinnacle of a "good job". The literacy rate here is at sixty percent.
Literacy. 60 %.
That right there should be reason enough for anyone who lives here. When 3 of my 4 kids were reading fluently, I had a better literacy rate in my household than the education system here was doing.
And both of the older kids have said college/school was like a game. Do what the schools want, get the "points", jump thru the hoops - pass to the next level. It is training to be a cog in the machine. My kids don't want to be "normal" and average and that's not what I want for them ether. I want them to be happy & satisfied, doing what they love.