Oh boy! Imagine having to type out what Recharge means in every card? we would actually take 10 steps backwards and be extremely limited in what a card can do. Cards can only have so many words as it is.
Learning how to recharge a card isnt that high of a learning curve that you have to explain it in every card. Apply same concept to other mechanics.
I get that if there is a new mechanic or keyword we would need to briefly explain it until everyone is used to it much like new keywords in Magic: the Gathering. However for basic actions that we are already used to, I am sure even the slower learners can pick up keywords like Heal much like they did for Discard, Recharge, Bury, etc.