the engine is made in way that YOU CANNOT progress unless you have some mandatory skills from other jobs. you cannot make end game gear without maxing out the other jobs. some were complementary. but as the difficulty increased with the introduction of 3 stars and 4stars. i can see that most skills are pretty much needed. (some you can substitute or discard. looking at you innovation/ingeuity2 lol).
if they remove this dependency somehow then maybe its ok to specialize in some/certain crafts.
like please, dont put Terminus Putty in all my recipe books again. where im forced to buy it back when they added 3stars for pretty much everything. i hated unlocking alchemist book just to make terminus putty. it was overpriced for no reason and was included in every important 3star recipe (you needed 2 per synth). this dependency needs to go :/