If you are hired as a programmer, then yes, just do whatever we ask of you.
But if you are hired as an engineer, everything the business asks of you comes with an implicit: "and make sure it's done in a proper way that won't break anything, or slow us down, or cost us too much, or limit our ability to gain a competitive edge."
You don't just change a 3 to a 4 because the CEO wants you to. You have to make sure the change doesn't come with unforseen impact that would put the company at risk, and you have to make the change in a similar way. That's what the CEO expects also. If you did the change, and it had caused impact to the business, that you had not pointed out, and for which the business believe is more harmful then having waited a few more days, you and only you are to blame, and you will be. You can't say, but CEO told me, you're the engineer, you're the person they hired to know this stuff and prevent these issues from happening, not the CEO.