This is the same fallacious statement in reverse. You couldn't build LinkedIn in a weekend because they do a lot of things you don't see. Also, when they fire a bunch of people, it will affect a lot of things you also don't see.
Could someone compare today's and yesterday's Wayback Machine results for your company's website and demonstrate the value everyone at your company generated today?
The GP post was a wall of text basically explaining how you can't run a large website without tens thousands of staff. Surely it would fall apart if you suddenly cull 10% one fine Friday?
I've worked at lots of companies where the product isn't optimized, it didn't handle Chinese or Arabic queries, or there were organizational issues. These things don't make a company fall apart suddenly, although they could be impediments for growth.
Don't know what consequences you specifically mean here, but some projects won't get done, some sales won't be made, some research won't pan out. Some institutional knowledge will be lost so the next rev won't go as quickly.
There will be many consequences, just perhaps not obvious for those on the outside looking in.
Except the original comment wasn't that. At all. It was a genuine question because a lot of us aren't familiar with these tech giants and how they're structured.
On every damn layoff thread.