There are certainly areas where this isn't true in the tech industry. It's very rare that an engineer can just say that they will no longer be willing to do on

There are certainly areas where this isn't true in the tech industry. It's very rare that an engineer can just say that they will no longer be willing to do on call work for example while staying on a team that maintains an online service. You can always ask for more money, but that's not everything that would be on a negotiating table.