This may be a linguistic thing, though. Perhaps we read that phrase in a different way. But to me, it very much echoes "it's about the journey, not the destination".
Going back to your point about "do you care about how they disproved it?" Yes, I do, and you should too. The michaelson morley experiment was a properly performed scientific experiment with every step documented so someone could replucate it. It is a source of truth which I can trust. On the otherhand if a tom dick and harry claimed that they had a vision and that this vision told them relativity is not true, I would definitely not trust such a claim.
Your point about the result being important is valid. Yes, as an engineer or as a business man results are far more important than process. But a scientist, must care about the process more than the result. If they didnt we would not be able to trust their conclusions.