Standing water is never a good thing. It is bad for most roots to sit in water and it encourages mosquitos, and fungus gnats.
Ficus will do that and the roots will take over a pot, and then it will try to escape through the drain hole and go to ground.
It is also why it is one of the easier bonsai plants for me to grow since the branches stay flexible a long time and the roots can be pruned without a lot of set back, even fairly large roots can be pruned, the plant may go through some shock and lose some leaves but I have rarely killed one that way. I had a small leaf ficus that was in an 8 inch pot and I could tell when it escaped because it would be too happy and I would try to lift the pot and found it had gone through the second pot and three feet into the ground and it did that more than once..
Happy gardening in Hawaii. Gardens are where people grow.