Also, if you can't compute in the morning without caffeine, there's certainly a metabolic health issue.
Your body is supposed to naturally produce cortisol in the early morning to wake you up, and give you the stimulus to get on with your day.
Cortisol levels slowly reduce as the day goes on, and that's what someone is supposed to get sleepy around late afternoon and early evening.
If you wake up late (like past 7am) and/or don't have the energy to start the day without a coffee, there's certainly something that needs attention. It should be treated like illness, and take strides toward recovery.
Drinking moderate amounts of coffee/caffeine is for pleasure, and for certain performance enhancements. It is not for replacing natural body functions that have diminished due to illness and unhealthy, unsustainable lifestyles.
I drink caffeine myself, but I'm not going to struggle with my day if I skip a day or two, or even if I were to completely cut it from my diet, because my body doesn't have this type of metabolic issues.