This is the exact same silly argument that people at Reddit used to justify buying the new macbook pros for all their developers. It starts off by implying that developers are 100% efficient w/ their use of time and any time spent saved will be spent doing something productive, instead of say: browsing Hacker News. And then it uses that implication to show off exciting statistics like "you will gain 5 weeks of developer time!".

I really feel like this is delusional thinking in the software industry and it seems to be widespread.