I recently started journaling by hand and was somewhat frustrated with the excruciatingly slow speed versus typing. Eventually, I realized that the slowness was, as you said, a feature. It forces you to
think. You have no choice but to take time with your words. Sometimes brevity is a gift (one I usually don't have).
I migrated to fountain pens and haven't looked back. Partially, it's because I enjoy the experience itself as much as writing, but partially it's because they've forced me to become even more deliberate.
I'd highly recommend it!