Okay, I have to step in here, because the quoted poster is the one "living in a dream world".
As you are aware, this was a lot of nonsense years ago and still is nonsense today. KHJ, KYA, WLS, WCFL and WABC of yesteryear were programing to a 16 to 25 year old demographic where many 16 to 18 year olds had zero money to spend and maybe just maybe you had disposable income to spend once you were out of collage or your trade school of choice.
Okay, let's take the tail end of that era. 1976 makes the math easier.
And let's take the more accepted 18-34 demographic, to make this a fair comparison in terms of how the ad agencies think.
Someone who was 18-to-34 then is 68-to-84 now, and let's look at the argument about disposable income:
When I was in my late teens, I bought zero stuff I heard advertised on WLS on WCFL because I had next to no money to spend on any of that stuff. As a 71 year old, I have money to spend on stuff I hear advertised if I desire. I'm sure the same is true for you as well.
The problem here is that the argument is based entirely on the poster's personal situation. I am only one year younger, and have a decent amount of disposable income (partially because I still have revenue coming in from programming the stations in New Mexico), but if you removed that from the equation, more than 25% of my income is from Social Security. Another 50% is due to my late mother having set up a trust a few years before her death which provides me with regular payments from two lifetime annuities ... but those payments are fixed, unlike SS which has an annual adjustment for inflation, so the buying power of that income decreases over time. (Supporting fact: $1000 when those annuities first started paying out is worth $642 in today's dollars, according to the inflation calculator at the U.S. Department of Labor Statistics.) For that reason, I have consistently put as much of that income into my investment account, which to date has added 85% in value over the amount invested. That's my hedge against inflation ... buying "stuff I hear advertised" provides no ROI.
I openly admit that I have it better than a huge percentage of seniors. According to the Social Security Administration, 40% of recipients have little to no other income or savings beyond their monthly SS benefits. Anyone who believes that those seniors -- almost 24 million of us -- are going to rush out and buy something just because they saw an ad for it are delusional.
If anything, studies have proven, over and over and over again, that seniors are the most brand-loyal consumers, and can't be swayed from the brands they have used for decades, much less get them interested in something new. It sounds like the poster's financial situation is much better (so is mine, to be fair) and if he wants to spend money that he won't have years from now when he might need it for something as basic as groceries I can't stop him. But he is an exception to the reality that those in the upper demographics live with.
The ad agencies know all this. And I note that products such as LifeAlert or step-in shower/tubs, aimed at the senior population, are all marketed via per inquiry/direct response, which means they were not direct cash buys by the agencies to the stations. About the only direct buys that have that demo in their target are pharmaceuticals, which do not translate well to radio and are virtually all television ads.
So ...
Ad agencies are living in a dream world.
No, they are living in the real world. You appear to be the one who is dreaming.