My gold standard for health decisions comes from mortality studies. While there is still much we don't know about the "best" approach to health, these studies can provide insight.
Regarding weight lifting & the value therein:
https://academic.oup.com/biomedgerontol ... /72/549632
This study echoes others in this field. Strength rather then mass appears to be more important. I'd speculate the reason for this is that muscle has a high metabolic cost to maintain.
Perhaps the value of strength training lies more in the neurological realm:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5472802/
If we look at both V02 max, and overall mortality, certain sports indicate better outcomes. Cross-country skiing & swimming appear to be the most efficacious in that regard (though admittedly these were smaller studies when it comes to mortality).
I think the reason for that correlation is due to muscle endurance being even more important then strength specifically as referenced in this study:
https://academic.oup.com/biomedgerontol ... 84/2328600
Regarding the OP's original question-I think it depends on your goals. Mine is to live well as long as possible. The above items, without even touching on the benefits of cardiovascular training tell me weight training isn't nearly as important as cardio.
While it's my own pet theory from reading the science, movement training rather then strength training in addition to full body cardio is my weapon of choice.