This is exactly true from my experience. When you learn an new writing system, seemingly insignificant differences can have a big impact, and writing by hand fo

This is exactly true from my experience. When you learn an new writing system, seemingly insignificant differences can have a big impact, and writing by hand forces you to confront them. Consider in Latin the difference between an I and an l, if you have never seen the latin alphabet before this might be quite confusing. Many writing systems have much more subtle differences than this, especially in cursive forms. e.g. if you use a keyboard you will never learn that م and ه are easily confused in Arabic if you don't write them properly. When learning vocabulary you want to focus on throughput. In the long term it does not really matter if you get a letter wrong here or there, it will correct with enough exposure and practice. The important thing is to do as many drills as possible with your chosen space repetition tool. A keyboard is a better tool than a pen for that.