It may not be an issue if your dh is teaching exclusively 6th form - young adults past compulsory education age & having opted to study a subject that has been 'sold' to them already.
By a qualified teacher, probably!
As for your 'more general' comments:
'They're not going to employ someone who is clearly crap!'
If you start routinely employing people who've never taught on the basis that they gave a decent interview, you are inevitably going to take on quite a few who subsequently turn out to be crap, though.
Talking about how you'd handle behavioural issues isn't quite the same thing as doing it. Being able to put together a good interview lesson is not the same thing as being able to teach to a credible standard all term.
Atm, you need to demonstrate a certain level of sustained competence to gain QTS. I'm not too fussy whether that is established via PGCE, GTP, or whatever, & I think we absolutely should be encouraging less conventional candidates to have a crack at it, but I do think it's massively important that you qualify by showing that you can do the job before you're allowed to potter on doing it for 40 or 50 years.
Gove is an idiot.