good argument mate! 
I think I’m a little bit biased on this topic, since I’ve been involved in planning, managing and making post grad certification courses, those typically take 2-3 years to make, and have very high requirements and a ton of paperwork to do before it’s officially accepted and accredited.
Maybe? I’m not so sure, some things might still be changing, like we’ve seen with the fine tuning format. But I think you’d already addressed that:
Again another good point I can agree with, but I’m more concerned about the perceived value of the certification, if we imagine a certificate that only covers the very basics, and is only valid for a short period, then I don’t see it as having much value, if any.
This is not a jab at anyone offering course’s, I’ve personally been though several of the courses from deeplearning.ai and I’ll definitely recommend them to anyone. But I wouldn’t be as happy if they started offering certificates based on these, because it would lock down the development of the curse’s themselves and force them to follow scheduled updates to align with the issued certificate.
At this point in time, I think it’s much better to just offer courses and not worry about certificates. 