> the benefit of immediately and clearly improving the life of someone else More like the benefit of people being ungrateful for the effort you put in and then

> the benefit of immediately and clearly improving the life of someone else More like the benefit of people being ungrateful for the effort you put in and then being hostile about your lack of continued motivation to solve their problems. All for absolutely zero financial gain, so the difference between that and a personal project is that you feel good for solving something, then bad because people hate you.