Some journals in fact implement this idea (e.g. having the raw data underlying each figure one click away). That is however not the crux of the reproducibility

Some journals in fact implement this idea (e.g. having the raw data underlying each figure one click away). That is however not the crux of the reproducibility crisis; it would be great if it was just "I can't make an exact copy of Supplementary Figure 5D", but rather "I can't confirm that protein X causes dementia using orthogonal techniques". There is no easy code fix for that problem.