There's a more fundamental problem with this: governments long wanted control over Bitcoin. If they manage to force miners to do what they want, Bitcoin is basically over.
Haven't they done everything they could in the last over 10 years? Bitcoin is going nowhere, not in the near future. In fact bitcoin is the solution for the new economy which many government do not want at all especially the US. These centralized exchanges are playing a key role for government censorship. Bitcoin community needs to do something to eliminate these centralized exchanges to enjoy the true bitcoin experience.
Apologies if my questions are too basic. If there are reading materials that explain in detail how the Bitcoin network works relating to some of the questions I posted above, I'd appreciate it if you can point me in that direction.
LoyceV already said what I was planning to write. Just a little suggestions - if you have bitcoin then don't keep them in an exchange. Move them to your own wallet.