I'm trying not to bite... Because I know how mumsnetters love a bit of army bashing but you're being absurd. There is also far too much on mumsnet of teachers are wonderful, overworked, highly educated etc... They aren't, some are, some aren't.
But hey I'm biting so here goes...
The aim isn't to let any soldier leave the army and go straight into a school without relevant training. Nearly all officers have degrees and a significant number of NCOs have some higher level of education and training. The army has an education corps so they actually have teachers! They will be selected based on their character, background, skills, educational ability etc... And then they will receive training. Soldiers and officers of the right character are hard working, capable and can be inspirational. They will potentially make great teachers, as do some teachers who went through the current accepted level of teacher training, some won't, but that's the same as those graduating with the PGCEs through the conventional route.
Give me 2 teachers, extreme examples I admit, and I know who I would want educating my child.
Young man, scraped a low 2:2, not interested in teaching but needs a job, fell into a funded PGCE. Spends his classroom days trying to be cool and pally with the students. Instead of marking homework goes out on the merry with his mates.
40 year old ex Senior NCO, no degree, but hard working (willing and capable to learn), able to keep discipline, not interested in being friends with the students, his only goal to see them successful. Used to working 24 hours a day, 365 days a year and therefore happily working long hours because he has a family to support.
It's not that difficult when given the extreme... I accept that the extremes could go in the other direction. But thats life.
There will be recruiting criteria and training. Stop being alarmist and 'only teachers like me, with a degree like me, are capable of educating children' - that's just bollocks!