I'm not going to shave my stubble off.
Why do you want to keep that stubble instead of shaving it off?
I'm tired of shaving. I want to be a lazy man for once and not do it.
Its your face and you have a right to look how you want. People at work will know you are lazy and judge you if they see a big scruffy beard. Do you really want that?
I don't care.
That is your right to feel that way. As long as your work doesn't have a grooming policy, I don't see what could be wrong.