People who spend all their time indoors (in front of screens) will seek to justify their lifestyles, just as those who spend their time outdoors will seek to justify theirs. There is nothing rational about pre-supposing that your personal habits represent some sort of optimium: it is only through careful study that benefits and costs may be determined.
Source for this? Searching for the claim only turned up results saying more time outdoors is associated with better long-term health outcomes.
Also: https://www.health.harvard.edu/blog/heres-something-unexpect...