It's such an interesting question and you are addressing lots of points. Yes, a "colorful" diet is important, and organic CAN be a part of it. However, something "organic" that was picked 3 weeks ago and shipped across the country or from South America has lost a lot of its nutrient value (or it was picked too soon, before it absorbed all of its potential nutrients). Also, organic food can be grown in depleted soils, so it's not necessarily nutrient-packed. It's free of pesticides, which is important, but it's not necessarily nutrient-dense.
Supplements in pill form are very overpriced and under-absorbed - maybe 20-30% absorption tops. The coatings that allow them to pop out of the pill molds are made of wax and even shellac, so that's questionable. There have been scores of reports about medications and supplements in the water supply - check major newspapers, and also check with any sewage treatment plant or septic pumping service. They are removing tons of undigested supplements from the filters - those are pills which people swallowed and which passed through the body not fully digested. Sometimes the name of the product is still visible! (Sorry to be graphic, but it's true.)
The vitamin/supplement market has blossomed in the US over the past 25 years, and at least 75% of the population supplements. Yet we have one of the highest rates of diseases, particularly preventable, diet-related diseases (cancer, diabetes, heart disease, allergies, even behavioral disorders and autism are exhibiting an alarming rise and early appearance in kids). So what does that tell you? The whole philosophy of choking down a handful of supplements is wrong.
The healthy human cell requires over 70 ingredients to flourish. Taking Vitamin X and Mineral Y and Herb Z in isolation doesn't work. If you're missing A, B, C and J, K, L, what you're taking isn't going to work.
The AMA even reported 10 years ago in their Journal that the American diet is insufficient, and everyone must supplement. The best form is a powdered supplement that is mixed in water or other liquid at the time you're going to take it. Pre-mixed formulas break down over time and aren't as potent.
We've found only one supplement company that does this well - everything's made in the US, it's not outsourced, it carries patents (almost impossible to get on a food product), proven safe, based on clinical trials, and so on. Unless you know exactly where your supplements are manufactured (not just whose label is on it or who distributes it), and unless it's in a comprehensive powder form, you're probably wasting your money.
So, in short, your friend is right. I've been working in this field for years and have helped a lot of people get what they need. My family's results are awesome and our physicians are thrilled with what's happened for us, and told us to keep doing it.