You get the good with the bad. It's easier to get hired if it's easy to get fired.
I'd buy your point about power imbalance if it was about blue collar workers. But not for IT, where jobs are plentiful and compensation is through the roof.
Why not start a coop with likeminded folks and give yourselves the protection from being laid off?
I’d love to find somewhere I could just spend the next 20 years, but that’s hard to find. There’s no job security no matter how good you are.
"My employer laid me off" doesn't and adds on the implications of a lay off in your field of work, so you get to start your search after being unemployed and possibly in a field with many others looking for jobs.
If you want to work in a stable environment where you don't get fired and your promotions and raises are few and far between and planned years in advance, you go and find a job in some bureaucracy. If you want the benefits of fast-moving high-compensation private economy, it feels weird to complain that this also includes quick termination on occasion.