It was fine before last major patch when you could get your BiS tool by investing your time and effort in it, also having to min/max your gear. So as a gatherer I could get my tool by gathering.
Since last patch your next tier of tools require Demimateria in great quantities along with Mastercraft one. My personal opinion is that you should not force people to get something that rare also requiring other (very expensive!) job.
And don't you ask me to go and buy that demimateria, cause prices are REALLY high on that and earning enough gil for it is too much for me while I have almost all master crafters and gatherers as since last patch prices dropped significally due to Hunt.