I'm not sure if that means anything though, to be quite honest.
That said, I think its really the business of technology, and that could make this useful, but for ICs or those on a more technical path that don't plan on owning a business? That is less direct.
All of this is to say, I think the more one understands the systems at play in which they live and work, the better they are at making informed decisions, especially about where to work. I left a job a few years ago for another one at a company that was working in the space that publications like this were talking about - but the market itself hadn't seen as high growing fields yet - and having that ahead of time analysis lead me to believe it would be lucrative for me to switch companies, and that really did work out for me.
To play the devils advocate - its important for leaders to know how their companies/efforts are generally perceived - whether or not the analysis itself is accurate is immaterial.
Secondly, the newsletter may simply be a way to learn about recent events. These folk have in-house analysts with possibly better quality data
Moreover, being able to think at a strategic, systems level about the technology landscape is a trained mindset and it helps to have sources of inspiration accordingly. Reading the work of people who think in ways you also wish to be able to think seems like good training for your mental muscles. Like all commentary and advice you learn to keep what you think is relevant and supplement it with your own information and ideas, but having the framework and the examples can absolutely push your further, faster.
If you are operating in a business-level capacity in tech where you have shallow but potentially valuable interactions with a lot of other people in the industry (eg, founder, operator, salesperson, marketer, etc), then there is significant value in reading the same things they do so you can anticipate their state of mind and have plenty of fodder for small talk. Your VC friends' comments notwithstanding, I think this is probably the biggest direct impact.
Secondarily, I think there is a good amount of passive value in reading good industry analysis if you ever want to run your own business or rise to a level of contributing strategic input within an established business. This is less of a straight line, but considering all the garbage put out by even reputable mainstream publications, and the sheer volume of zero-value entertainment options, I think reading expert analysis by well-informed, well-written and consistently committed individual authors is probably one of best ways to get quality information. That is no small thing in today's world.
All that said, I think you are right that focusing on your family and more local concerns will probably be higher ROI, but it depends what you're optimizing for.
I think where the value lies is in when I am asked to give input into product or technology strategy. Having a broader understand of the technology ecosystem is a useful foundation for making recommendations to my specific scenario.
The impact comes with what you do with what you've read.