As someone who has spent their career with startups, I would say go for it, but not all in ... make sure to finish high school as the new venture may not pan out. At a minimum, they will learn the ins and outs of entrepreneurship. Valuable, lifelong skills.

I've mentored college students, and starting up a business while a student is one of the best times to do it. Most students have little to lose when starting a new business. No mortgage payments, no family to support, few bills to pay, etc.

There are also many resources available to help students. Some high schools even have entrepreneurship tracks, many community colleges and universities have advisors and other resources that may help. There are also business plan competitions and grants available to students that can provide funding.

Starting a business as a student can be very rewarding and give you a strong sense of purpose. Just don't sacrifice the high school education for it though. Get support when and where you can ... advisors, mentors, parents, and partners.