I once read that meditation can be an excellent way to build tension and release it, just like more common forms like music, exercise, sex, etc. After realizing this, meditation made more sense to me and became more attractive to me. Humans need forms of healthy release!
As far as the vid on there being no truly altruistic altruism, I'm relieved to be hearing it in the Ask Teal Saturday series. I've been involved in many volunteer groups and even leadership on them. People act from their beliefs. People act according to their intentions, agendas, desires, inspirations. Some do so in healthier ways and some do so in more unconscious, deterministic, burdened ways. When I was volunteering, some of it was from joy and some of it was from outdated religious concepts (that saturate all of Western society from thousands of years of Judeo-Christian influences) of suffering, sacrifice, and martyrdom.