You're assuming the conclusion by defining God as the ground of goodness, truth, and love, then saying worship is automatically the fitting response. But that's exactly what we're debating. You still have to establish that this being exists, that those attributes actually belong to it, and that they make worship morally appropriate.
And the drowning analogy doesn't work if the same being supposedly has unlimited knowledge and power. A human rescuer may be unable to save everyone, but an omnipotent God supposedly isn't. If God knows exactly who will suffer, knows exactly what would convince every sincere nonbeliever, and has the power to provide that evidence without sacrificing any greater good, then allowing people to face eternal punishment for nonbelief raises a much stronger problem than simply asking why a human couldn't save everyone.
I'm not demanding that God follow my preferred timeline. I'm questioning whether a being who creates people with different evidence, knows exactly what would convince them, and then eternally punishes some for failing to believe is actually worthy of worship. If worship is supposed to be based on goodness, then calling God “good” doesn't settle the question. His actions have to be consistent with the goodness you're using to justify worship in the first place.