Nobody will notice the ceiling being off, because nobody ever looks
up.

I repainted part of a wall that was next to a window, 15 years after
the original paint job. Hung something over where the two 'colors'
met. It's still a mismatch, a foot apart, and nobody sees it.

My kitchen ceiling was patched with wallboard, I haven't plastered
yet, it's been six months, nobody's even noticed, except when I
pointed it out.