Why does continuous deployment help? It helps by pushing many small updates instead of a few large ones. For a large code base with many developers this is a big benefit. To use it you need excellent automated test coverage and a reliable deployment tool. For a small team, it is probably a waste of time to setup.

I recommend focusing on only the most important tasks for making your product "something people want" (to quote pg). If you're spending a lot of time wrestling with deployment, automate it. If it is a few minutes a day, focus on other things.

I'd also make sure to think carefully about which components you do and do not learn deeply. If Capistrano is important to your product and you're spending time with it, learn it yourself. If you're spending more time on frontend website app development, learn a web dev framework instead. This is a judgement call.