yes you can let the software do the work, but should you ?
all my experience leads me to say no. you shouldnt let it.
here are my reasons why.
1. you will have turnover of staff; new staff will take some time to adjust to get good at making models, or get good at design (depending where your turnover happens),so you will need to hold their hand with wax touchups of the die.
2. you will have terrible doctors. everyone does. some need a bit more help than others, and the software isnt always smart enough to do it right. this leads me to 3
3. it doesnt always do it right. it will try to block out what it can but certain bridges just can't be digitally done unless you are me, or sevan, or Kent.
4. if you lose your system in an epic power crash where your machines no longer function due to the solar flares, zombies, or the reincarnation of the buddha or some other such ridiculous event, you will still need to know how to do this blockout manually. you know, so the zombies can get proper dental coverage.