Don’t work in your pajamas or sweats. If you are too comfortable and relaxed in what you’re wearing, your attitude is too comfortable and relaxed.
If it's not the doorbell then it's a colleague. If it's not a colleague, it's the cat, or the Xbox, or something else.
But, maybe it's you?
Maybe you're using any sort of annoyance / interruption to claim working from home is too distracting.
Like what you do, focus, and do it.
No matter where you're working.
Or what you're wearing.