Can you list some reasons where I would want optical zoom and can't simply move in closer with the camera?

I have been looking for a new camera. I am an advanced amateur still in the learning process.

I have always been attracted by long, 10x or more zooms on compact cameras, but when I think about it, I don't use the zoom all that often. I use it here and there for animals, framing shots I can't get physically closer to by feet, etc.

I am deciding whether to buy a compact megazoom like the Panasonic ZS5 or a higher end compact with less zoom like the Panasonic LX5. Both are appealing in their own ways, so for me it comes down to if I'm really going to utilize the megazoom's zoom range.

So can you list some cases/reasons I would use/want more optical zoom?

Thanks