Home gardeners can't diagnose when to salvage vs. cull diseased tomato plants, leading to total crop loss

Home gardeners face early blight and other tomato diseases but lack clear decision frameworks for when to remove individual leaves versus scrapping entire plants. This uncertainty causes them to either act too late (losing the whole plant) or too aggressively (destroying healthy plants), resulting in wasted growing seasons and failed harvests. Current solutions are fragmented across forums and lack actionable, disease-stage-specific guidance.