If "hurt" means "anything that keeps me from making as much money as possible to the exclusion of other people's interests"...
I think you get where I'm going with this.
Am I duty bound to vote for, and encourage others to vote for, any party that would lower corporate taxes?
Do I have to (in this example) do all my shopping through Amazon, or am I also allowed to shop at competitors?
So yes, I think you can get more nuanced
Take your strawman back.
I didn't say "tangentially", I said "explicitly". Anything that is aimed directly at the company itself. Like suggesting to nail the office door shut to prevent any work from being done.
You wrote "to explicitly hurt your company". I'm not sure the word explicitly actually changes the meaning here. I could campaign to introduce a carbon tax. I'm not doing it to explicitly hurt my oil company employer. Even if I know it probably will at some level.
There's degrees of 'explicitness'. What about campaigning against fossil fuels if you work for an oil company? What about a car company? Theres a line, and I'm willing to bet it will differ from employee to employer.
Imagine that you are the employer and an employee of yours, on their free time, goes around agitating others to explicitly hurt your company. Can't get any more nuanced that this.