800, or even 200 hours need not be a problem when you can find the right individual. In fact many major airlines have done this from time to time - though most of them have extremely rigourous aptitude and personality testing. In addition, they have had the internal knowhow and experience (ie skippers and training organizations) to deal with these inexperienced FOs, giving them the extra required Tender Loving Care.
I think the problem really arises when the total combined experience of the FO, the skipper and the company is low, as it often is with startups, rapidly expanding carriers or carriers with a high turnover of personell (which normally equates to poor terms and conditions). Some seem to have a selection criteria of "ticks in the box only", simply to fill the right hand seat with a warm body, to keep the show on the road.
There is a major difference between the two.