While those things are great, they're also one-and-done transactions. All the other person needs to do is say thanks and be appreciative. Building friendships

While those things are great, they're also one-and-done transactions. All the other person needs to do is say thanks and be appreciative. Building friendships is actually harder. It takes more time and more effort, on many separate occasions. And there's no guarantee it'll be worth it, either.