That is how you see it.
Maybe let me explain how I see it.
Farmer
1) A farmer leave his TH outside
2) He hope someone will come and snipe his TH and go
3) If its successful; Gain: 12 hours shield Loss: 1000 gold/elixir and some trophy (insignificance)
Champ
1) A champ leave his clan
2) He hope his clan mates or friends find him to give him cheap shield
3) If its successful; Gain : some trophies Loss: some resources in the process (insignificance)
Both did something with an intention of achieving something that will benefits oneself. Both had done something that is not what the game intended them to do (of course, the farmers will say otherwise...Lol

)
That is how I see what both is doing. I am not condemning the champs nor the farmers. Both exploit the game mechanics to the fullest to advance the game to their most desired position(Trophys for champs and resources for farmers).
But what I don't get is why one side can relentlessly blame the other side when they are doing something similar in nature (Of course the farmers will again say its not similar)
Going by my definition, its similar but going by yours, it might not.
Not trying to prove anything here but just trying to show that there are other ways of looking at things and insisting/proving on your way is right may not be always right...