I wouldn’t call link building as “wasting time” because you are actually building trust and authority to your site.
This is an investment to increase your website value.
If you can manage to get 3k visitors, how many of those visitors are converting or giving you profit?
Of course, we can’t see much on new sites but it really matters to draw targeted traffic.
Try to check your bounce rate, time spent on your site, page views per visitor, adverts earning, affiliate sales, etc.
Also, check your current ranking in search results for your targeted keywords and the only best way to improve the ranking is by building links.
So, I would say you need to build back links in order to increase your website value (traffic, money, etc).
Article written by SEOnotepad.com