No, it isn't. Your analogy, would be the same as if you drove to work in a car instead of walking, quality of life change.
The only difference is the intended design of said machines.
However wheelchairs and cars both have no relevance to this argument.
Bash add-ons all you want, but you've already proven you have no clue about tank dps' relevance to raiding/challenge modes/soloing/brawlers guild. And just continue with pointless and incorrect analogies as to why an add-on, that shows the value of AP directly without need for character sheet open or mouse-over, is relevant and useful for its target audience.
After all, if you fail to see the usefulness of an add-on which makes it easier to track vengeance, and the reason why tracking it is useful then all you're saying is you play sub optimal and are clueless about this game.
No one cares if that's the way you wish to play, but don't disrespect others that make use of tools that give quality of life changes to increase their performance.
For future reference using an addon which doesn't automate anything the player does would have a closer analogy to getting a new pair of running shoes. helping your performance is not the same as automating it. Which is what your wheelchair analogy suggests.