The thing with Kovar is if you google Kovar mistakes you can find reels of his errors costing Man Utd, Sparta Prague and Bayer Leverkusen goals in games (ingoring his several errors when with us), but he seems to do enough in the rest of the games to still be considered a decent keeper.
I guess he is a bit like Calamity James, always looked weak for Liverpool/England/West Ham etc but he still managed more than 50 England caps yet never ever looked solid.
These coaches/managers/scouts must be able to see something in Kovar to keep getting transfers to big clubs.
But is that not the same for all keepers. I could Google any keeper and there would be dozens of mistakes for each one. Mistakes are a given for all keepers especially with the way they are now told to play. It’s leadership/command/confidence, that ability to pull off the 1% saves and increasingly be an 11th outfield player that managers focus on now. Kovar probably ticks the 1% and good with feet boxes and they hope the other comes with experience.
If you take Bycroft for example on the opposite side of the spectrum, he has none of those and still makes dozens of mistakes which is why he’s been binned off. There’s not a great deal of potential there.