Why do we have to keep criticising players who we know are not at Championship standard?
Once that fact is established, further criticism directed at the player, is pointless, unless they show no effort.
There comes a time when you just have to accept that.
By most peoples reckoning, Biamou started the season as fourth choice striker. In a normal season he might have made the odd sub appearance late on, or perhaps a start in the Carabao Cup. Circumstances have caused him to be a regular starter. , Gyokores and Bakayoko haven't shown enough, in Mark Robin's opinion, to displace him.
OK, he's above his level but why be so nasty about it.
Walker has shown that he is a good finisher, which is promising, but he's been injured and had Covid, which some people take months to recover from. We don't know yet whether he'll make the standard and it will take time.
As a club we might not have that time but that's another issue.