lmao! i'm cracking up reading the "whats the fun in life if you cant sit on a cactus?" arguments.
cause honestly... thats what 4 hours of running missions and never getting one to pop that yields what you need amounts too. If you enjoy sitting on a cactus, more power too ya, but most people dont enjoy this practice and certainly dont seek it out for the fun of it.
randomness in material availability is not logical. there are always materials in the universe available, they dont randomly dissappear and then come back later after you have run a bunch of other pointless missions. they always exist all the time, you just decide what you are attempting to acquire, maybe you succed, maybe you dont, but you DONT look around the galaxy going "whoa dude...whered all the thermionic gel deposits go? guess i'll just go get some power crystals, that i dont need, 'till the universe decides to plop some more out." So yeah, I find the "real life" argument weak, to say the least.
and as for the dude threatening the relog work around with banning... seriously?!... we're all shaking in our boots.
There is nothing fun about this, ehem....."feature"....that adds to the game, it simply detracts from its enjoyment for the vast majority of players. it is a significant problem on a rather long list, that has made crafting one of the top complaints about the game. It has potential, but its got a ways to go.
keeping at least one type of mission yield in each bracket at all times (excepting the current level bracket which still may not have a full roster of missions yet) is the easy fix for this issue.
then if you think you need to gather unneeded mats before you feel that its morally exceptable to go after the mats you need...its your choice...knock yourself out.