I'm tempted to disagree somewhat as a mid-20-somethibh. I think your point is excellent overall but I also think it's pretty important to have plans. Just don't expect to have 20/20 foresight and that your plans will fail - but the takeaway is to make more, better plans, and do your best to take failure on your chin, rather than to feel it's okay to just drift not knowing what you want in life and not planning on how to get it.