HTML processor, linting and validation, SSG

Guys I have a few questions about the mentioned topic. ik these are pretty much adv but why not to have a look at them.

1. HTML Processor: I saw that instead or processor we can use react. as react have all the features that a processor can have. so, it isnt worth to learn about processors these days. am i right?
2. Linting and validation: there are vs code extension that does the same work so, what i think is we don't have to install any other linting and validation tool like HTMLHint.
right??

3. Static site generator: Idk much about this. I just know it makes HTML with the help of given template code. But i don't think these are even used these days. I like to write my HTML manually.
am i right about all this? and if i am wrong somewhere plz correct me.
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