Yes, Bob, you're right.
It's just a matter of personal choice.
I usually only rewrite the chords again at the beginning of a new section or when there's a change in time signature. Otherwise, as long as it's the same chords that repeats over and over, the repeat symbol works just fine.
The reason why is that it's easier to spot a different chord change when reading from far away. Also this is to avoid to constantly look at the chart. If you take a tune like "impression" or "so what" (well, there's no need for a chart for those songs, anyway), but you can see from far away when there's a "different" chord coming. I've also found that this way is easier to memorize a chart, because you only need to process new material.