Photo is very strong; nicely composed and exposed, although there are some hot spots at the edge of the clouds nearest the sun. Topically and with reference to your title, I think this would be stronger if there were only one chair.
BEAUTIFUL scene! Nicely shot too! Certainly conveys the message nicely although, I'd be more inclined to say that a single empty chair might have been more effective. However, we get the point and I'm sure those chairs were too heavy to move! LOL