I'd argue this is true for social networks like Facebook actually. There was a magical period in Facebook between 2005 to 2010 or so where it was mostly college friends, high school friends, some work friends, and we all actually shared what we thought on our posts, shared links to interesting stuff, etc.
When all the relatives started being added to your network the vibe became decidedly different, and then acquaintances, people who aren't close, etc. and everyone has that one experience where one time they post something and someone who isn't close get offended, whether it's political or not, and they gradually share less and less.
> Nothing you post there is going to change your career.
I can attribute millions of dollars in revenue to LinkedIn, as can a lot of my 'LinkedIn friends'
> Doing work that matters might.
This is a pre-requisite for winning on LinkedIn. The kind of content that performs best are strong opinions informed by actual expertise.
> Go for depth over frequency.
Unfortunately that's not the way marketing works. 95% of your audience is not 'in-market' and ready to buy when they see your content. Sometime over the next 3-5 years they may move into a buying lifecycle, and they are much more likely to trust you, and therefore buy from you, if they've seen your content 1,000x vs a couple of long reads.
> If writing online matters to you, you’re probably better off starting a blog and building things there.
Your long form, in-depth content lives on your blog, and your LinkedIn profile should act as a funnel, moving people from newsfeed --> your profile --> the most important piece of content you want them to read. From there, you can capture their email to touch them on another channel (inbox), push them to your YouTube / Twitter / community, etc.
With that said, while LinkedIn is responsible for a significant % of my total revenue, it's also responsible for a significant % of my anxiety. Building in public invites folks to publicly blast you if they don't agree with your ideas. 'Getting ratio'd' happens. LinkedIn eventually becomes a mentally exhausting slog. But as a career driven individual the upside has been very high and I think the trade off was worth it. I would do it again knowing everything I know now.
For devs who currently think this way, I suggest thinking about it more deeply from the perspective of a developer: Let's say you want to start a company/startup from a passionate idea you had. What do you think happens when you build it? In reality, do you truly expect "build it and they will come"? What happens when you bought a domain, put up your product on the web, or the app store? I can tell you what will happen: there will be zero people signing up to use it. Posting it on a Show HN or Product Hunt is an illusion of ease to publicize a product. A PH launch is a carefully planned and curated process involving hours and hours of marketing work to prepare for. A Show HN post will go unnoticed with no clicks 99.9% of the time.
And if you just work in a bigger company, as a non-founder, and say "this isn't my problem, I just build stuff for a job", what do you think the founders did to build their company so there are users who sign up and pay?