Yes, two people getting a P<0.05 and both setting up the experiment are better than one.

How many false-positives get published as opposed to negatives (or rarely even false-negatives)? If the ratio is too high then you'll need more than just two positive studies. If, as claimed in the quoted article, 70% of papers in a field are not reproducible that implies finding papers at random would require about nine positive studies to reach a true P<0.05, and that's only if each paper is statistically independent from the others.

If there is financial incentive to reproduce existing studies when there is a ready-made template to copy and paste into a grant-funding paper I think the overall quality of published research could decline. At least in the current model there's a financial incentive to invent novel ideas and then test them, versus just publishing a false reproduction.