Hiya Grumpy!!
As someone who has just done a complete career change and now publishes magazines, I can assure you that the advertising that you complain about is what pays for the magazine. No ads, no magazine - its as simple as that. If you don't like the products then don't buy them. But for every product that you don't like, there will be someone for whom it's exactly what they have been looking for.
To give you just a couple of examples, many diabetics carry medicalert id which is internationally recognised and could be a life saver, but wouldn't have done so if they hadn't seen the ad. I use a Frio bag for my injection pen when away on holiday. I had never heard of them until I saw a Frio ad in one of the magazines and thought what a good idea - I'll try that.