with current rotations you def dont need all however each patch can bring different ways of accomplishing the hq outcome and so with that said it is much better to level all crafters so you have access to all skills.

the easiest way is just do dailes, this way you can put minimal effort in. check mb for cheap turn ins and dont be afraid to use nq turn ins as some xp is better than no xp.
also the time it requires to get mats can make a vender or mb nq better to use.

no need to rush but you should def push yourself to get them all incase you need the skills later.