A substantial part of 7 psychology is constantly staying active and occupied to avoid confronting a nagging feeling of guilt that lurks deep inside. 7s are connected to 1s, after all, and while they're not superego types and they do prioritize enjoyment and pleasure, there's always a mostly-ignored voice deep within nipping at their heels, saying "you know you should take things more seriously/you know you could do better/you know you're not doing what you should be doing", and this self-judgment is a major driving factor behind their race to constantly find new, exciting things to do that can drown out that voice.