Interesting argument that the author is making. Most people will say that in your 20s you need to make as many friends as possible and that we need to ensure that they stay deep, so that when you need help, these people will be more willing to help you if you know them well.
But the author argue the opposite. Most people would be more than willing to help you out of the kindness of their hearts as long as it does not greatly inconvenience them. They have a “high” from helping people. So, the author argue that these “weak ties” are very important and they are the ones who will help you experience new things, gain new experiences and views. All we need to do is ask them, and these favours will also help you to grow closer to them.
However, the author did warn that we need to ensure that the help we request from others must be easy and measurable.