> If huge tech companies like google, facebook, airbnb etc are unable to make fast websites... then why should we use their frameworks and tools?
You don’t have to at all. Lots of folks do because “fast websites” is one requirement out of many to consider.
What about secure? Stable? Reliable? Maintainable? Reusable?
I personally build excessively lightweight and simple web UIs for my personal projects, but I’m not managing infra that >1bn people use daily and is literally used to answer “does my internet work?” because of its expected reliability.