More like materializing a taxi out of thin air and then riding it through buildings to the finish line.

At that point the focus is no longer on the running aspect of the race.

It's the difference between a baseball game and a home-run derby. Nobody's complaining that home-run derby is "cheating" because all the pitches are ideal. It's a different game altogether.

The tool-assisted speedrun people are simply playing a different game.

A better analogy would be a guy taking a taxi 26.2 miles and you coming along and saying, "I hate it when people move a marathon distance by any mode except running" for no discernable reason.

You might be interested in Let's Play then.

http://lparchive.org/