Consider this - you know you want "line", you see the word, you point to it, you click it.
- or -
You point to a little square photo, and then pause, waiting a few seconds for the mouseover to appear. Nope, not that one, move over to this cryptic picture, wait for the text to appear, nope. Well, what about this little square image. Three more seconds, nope. Aaargh, over to this one - aha, a red-ended dumbbell is a "line"
5 seconds versus 15 seconds. Egads, how did we allow this to happen???
Some folks say - just remember what picture does what... Yea, once you memorize "these" icons, and "those", and "the other ones over there", you pull the plug decide to break out the T-square and the pencil pointer...