Why did Foster pick Karl T?
I disagree with him of course but the reason is obvious.
The other looseheads are a debuting Ross and a still fairly new Bower (who has limited experience outside Australia). Neither sounds convincing against the Irish. So what does Foster do? He picks an experienced fella that he thinks is a pot plant. Nvm if he isn't that good around the field (and Karl really isn't good around the field), he's a pot plant and he won't be shoved backwards.
The alternative, in Foster's mind, is someone like De Groot - also very new - if he gets overwhelmed by the Irish, and Bower also gets destroyed, the scrum disintegrates. Foster is wrong because this is merely perception. Karl T hasn't shown much scrummaging prowess this year, which he also why he doesn't start at the Blues. There is no way De Groot is not fitter than him.
So in a way, this shows our lack of really top-notch prop stocks with international experience at loosehead outside Joe Moody. The English/French be much more confident blooding a new bloke because you are essentially scrummaging other monsters week in and week out in a region that really loves their scrummaging. In contrast, if you are kiwi, your competition is Eloff and Paddy Ryan and some other wanker. These guys are not international standard, so even if you dominate them, so what? We really do need to start playing Saffas again. Our decline has also coincided with excessive playing against just the Aussies.