means that you are questioning the judgement and defying either the people who upvoted ("you think this is good content but I think you are wrong, this is bad content") or the very system of steemit (with bots and all)

Yes that's exactly right and people should be (and must be) skeptical of each other. In a decentralized system the answer to "Quis custodiet ipsos custodes?" (Who Guards the Guards?) is "each other". Our voting decisions are all open to scrutiny and disagreement by each other. That is the only way this system can work.

If the Steemit system leads to absurd rewards because of bid bots and other abuse then the correct approach is to tackle the issues with the system, not each and every post that exploits a broken system

I agree with that, but downvotes are also part of the system. If the system can work (at least better) with a new and better emphasis on downvotes, and new and better ways of downvoting, then everything is just fine. The goal is a system that works well, not a system that works without effective and intelligent use of downvotes to express and mediate disagreement between voters, whenever needed (not just in specific cases decided by you).