Because if the player is not willing to accept responsibility, they should walk over and remove the flag themselves.
The reasons people have a flag attended are because they may be in a position not to see the hole, or it may help in depth perception and judging distance. In any case, it is the call of the player to decide whether they want the pin attended or out of the hole.

Golf is like life. Some people play the game the way it should be played and some people bitch and blame everything but themselves.

BTW, besides having the hole to hold the flag, the cup liner has water drain holes in the bottom. The correct way to tend a flag is to pull the flag, place it back in the hole resting on one of the drain holes and stand two or three feet from the cup. When you raise the flag, it will never stick.

Jan, you have got to stop this and soon. We don't need Don getting all giddy when people agree with him. Or is Jan just another one of Don's alter ego's he uses on this site to agree with himself???

One more time Bill H. hits the "ball out of the park"...
If you watch any professional caddy they tend the pin exactly as Bill states...Pin resting on drain slots..Never down in the actual pin slots. as soon as player strikes putt pin is removed...Why the confusion...The "pin in" provides excellent depth perception from 20"+...
You should try it...
Bill did you caddy when you were young...?