That time is spread randomly over thousands of devs and not lost all at once during a sev1
That time is spread randomly over thousands of devs and each of them encounter similar package dependency issues every other day. Its not 1 in 1000 devs every day. Everyone will need to solve it locally themselves.
Better to have hundreds, or * gasp * thousands of engineers having to fix local package dependency problems on their computers every other day. Much better than those engineers having to keep that gigantic context loaded in their mind so that they fix those local problems.
That effort spent for maintaining local environments and navigating the package management hell is effort not being spent on creating actual code.