I am one that grew up with the "my once, cry once" along with "you get what you pay for" and a couple of other crusty old gems. Depending on what I am buying, I still follow those rules.
On the other hand, I buy lots of tools as a contractor and buying the best you can afford all the time simply doesn't make good sense. As in the home, the boys on the job don't really respect good tools. They like using them, but they don't really appreciate them and it best they take minimal care of my tools. It works the same way at my house.
I have an elegant, and simple solution. I try to buy exactly the right tool for the job, not paying too much, but getting as much as I need. At home it is not unusual for me to cut up three or four pounds of vegetables, a couple of pounds of meat and anything else we need to have to have a nice dinner. I cook everything fresh so that means every single night. When we have company, it is the norm since I am the cook that I will be cutting up several pounds of meat, several pounds of vegetables, and anything else that might hit the menu. I buy bulk cuts of meat like whole pork loins, beef clods, packer briskets, etc., and cut them into manageable sized pieces for later cooking. I buy whole pork shoulders and butts so I can make my own sausage, which means 1" strips of a 13# piece of meat to fit in my meat grinder.
I have given cooking classes, and even won a couple of chili contests. I can chop, slice, mince and do any other knife related kitchen chores better than anyone I know. Yet, my main chef's knives are very humble affairs. I bought them.not for the steel for the name, but how they felt in my hand when I used it. The steel in my chef the knife is strictly middle of the road, and that suits me fine. If I'm cooking dinner for me and the S.O., or having the extended family over I sharpen that knife every time I use it on my 1200 grit rod. It's all the knife I need and I enjoy it a great deal due to its comfort in my hand. So right tool for the job. And to keep things running smoothly with my knife care, I bought a second set of lesser quality knives (and expense!) for the lady of the house to use as she sees fit. She does not like them too sharp as she cuts herself on occasion, and does not have to worry about being in an argument if she put a good knife in the sink after using it, or in a drawer full of crap after it's washed.
So I have the right knives for me, and she has the right knives for her. And there is peace in the valley. My favorite chef knife sold for about $100 when it was made. That's it! But as any dedicated cook will tell you, you reach for the knife that is most comfortable to use. If I took the example of buying the best I could get I would have someone make me some kitchen knives, or would buy some of the custom Japanese stuff that is out there and be spending a few to several hundred dollars. No thanks. My favorite chef knife has made thousands of meals (literally) and is now about 12 years old. I was lucky enough to find another one just like it on the 'bay, and bought it as a backup years ago, but haven't had any reason to use it.
I remodel a lot of kitchens with my business. And for fun I go to people's houses to help them cook dinners and have a nice evening. Out of my clients, prospective clients and my friends I only have one friend that really takes care of his knives and keeps them sharp. The others have a drawer(s) full of crap, and since they don't want to learn how to sharpen a knife and maintain it, they might as well have a drawer full of butter knives. Since they won't put the effort into even buying an electric knife sharpener, there isn't any point for them to buy anything of any real value. It just isn't anything of interest for them, like my own extreme personal lack of interest in golf clubs, tennis rackets, or buying $150 bottles of Scotch to kill in an evening.
So I agree with the chef on the radio show you heard. If someone isn't in to cooking and sees a knife only as a necessary evil, I get it. They have their own interests and sense of perspective and kitchen knives ain't it.
Robert