The HN crowd, me included, are real humans with real needs and smartphone apps and convenience brings a real value to my life. For one, transparent syncing of photos, notes, basic spreadsheets and many others is a huge selling point of iCloud.
It's not about if I can buy a cheap FreeNAS rig -- an i5 CPU and 10-year old motherboard with 16-32GB of DDR2/DDR3 RAM -- and gradually add WD Gold hard drives to it. It's not about if I can use Syncthing and a command-line password manager. It's not about if I can use PostmarketOS or LineageOS and thus only buy Android-enabled devices (yay Linux freedom?).
I can do all that. But it requires more manual management. And I just don't have the time and energy for it.
It's strange to me to imply that the HN crowd are some sort of world-changers that never have financial struggles and live in beach houses a la Iron Man style with 3x independent gigabit fiber links and 500 sq.m. of home labs that rival Mythbusters' space -- and are constantly busy disrupting an area.
Truth is, even though in principle you are correct -- and even though I really would like to only use free [as in freedom and not a free beer] hardware and software -- the reality is that we all have jobs to do. And most of us actually love the people we live with and would want to spend a chunk of our free time with them. We all would love to get a normal amount of sleep and invest in the knowledge necessary to get proper nutrition because we're literally a hugely complex chemical compound and we better put the right chemicals inside of us...
...etc. etc to infinity., I can go on all day and night but I am pretty certain you got the point.
The HN crowd is certainly much more aware than many other crowds. Doesn't automatically imply they have the means to change a lot of things. Trust me, I'd like to live like Tony Stark and invent a ton of stuff that can change the world -- that includes his house and a lab -- but I am gradually coming to terms with the fact that I'll very likely stop at having 7-10 profitable consultancies and/or lifestyle businesses that will give me a peace of mind even after retirement.
Life is short and many of us don't want to work 24/7. More power to the people who can maintain a good living AND be inventors and disrupters. I have big respect for them.