I think Bob has a right to be a little frustrated. For 30+ years he has been listening to comments about "why should I pay so much for a set of fins" from people who have never tried them but still want to bash them. There is a loyal following who have tried them and when given a little time to adjust to them, have found that they are definitely "worth the price". Some folks purchase based on "value", others purchase based on "price, and still others purchase because someone tell them "this is the fin to use". I am a value buyer.
As I said above, there are different Force Fins for different diving conditions. If you routinely dive in stiff currents or need a fin for positioning yourself for photos or need a fin for slow, easy diving/snorkeling, or need a fin for fitness training - there is a model of Force Fin that will fill the bill. Also, all Force Fins are made of high grade polyurethane materials - and they are made in different grades/types to match the performance requirements of the particular fin - plus they are all hand made in the USA. All of this goes into the higher cost for Force Fins.
Are they worth the money - well, why do you pay $750 for a "high end" regulator when the tests in Scuba Diving magazine show that there is little difference in the performance between it and a $400 regulator (especially if you are not doing "extreme" dives)? And I will bet you will trade regs every 4-5 years. So why do you think is "silly" to spend the same for a pair of fins that will make your diving much more comfortable, probably result in more reduction in air usage than a high end reg and will last you a lifetime of diving?
By the way, I don't have any connection to Force Fins other than as a user. I admit, I am a gear junky - 3 double hose regs, 3 single hose regs, wet suites from skin to 7 mm, 4 masks, 4 BPWs, 3 UW cameras and 7 pairs of Force Fins. And if I could only take 2 items with me on a trip, I would take my prescription mask and a pair of Force Fins that I think would best match the diving conditions (all the rest I can rent and make do with).
Hope that helps.