Honestly, how about using a little logic. The location was a poor choice visible and illuminated somewhat from the car park. Supernaut brings up another point the glass pieces were "soldiered "on the outside ledge. You imagine Guede took the time to carefully remove and line up the glass.Nonsense if you have ever replaced a broken window you would know that old paint makes the task of removing glass from the casement difficult. People often use pliers. The prosecution believe the shutters were shut when the rock was thrown from the inside, the pieces of glass stopped by the shutter fell in a line on the outer sill. It is for this reason than none fell to the ground under the window.
I have renovated more than 50 old wood casement windows. The glass in the wood windows that I have renovated is held in place with glazing compound. My guess is that the window in question is similar to the ones I've worked on.
I would note a few things with regard to the claim "that old paint makes the task of removing glass from the casement difficult".
1. The condition of old glazing compound varies greatly. In many old wood windows some of it has already fallen out. In others it has become brittle and cracked and is easily removed. Sometimes it is in relatively good condition and it can make the the glass somewhat difficult to remove.
2. When a window is broken, the glass shard itself can act as a lever that allows the shard to be removed easily by wiggling it a bit.
When the comment was made that the glass shards were "soldiered" (I took this to mean the shards had been removed and leaned against something so that they were upright) I imagined that the person using the window as an entry point removed the shards in this way and set them down so as to not make any more noise or just because that was the way he chose to do it without thinking much about it.
But again, these arguments that Briars makes about the broken window can be used to support the notion that the break-in wasn't staged at least as well as to support the notion that the break-in was staged. If the glass shards were difficult to remove why would AK or RS mess with pulling them out by hand? They could just take the rock and bash them a bit more to clear out the opening.
The kind of arguments that are being made that the break-in was staged because of the particular window that was broken are very similar to the kinds of arguments that could be made that a break-in was staged in any of the other windows in the house. e.g. No burglar would have broken through this window because it was a double pane window, or no burglar would have broken through this window because he could have pried it open with a screwdriver, or no burglar would have broken through this window because it was too exposed to the road, or no burglar would have broken through this window because it was too big, etc. All of these kind of arguments are made based on an assumption the state of mind of a particular burglar is knowable and the assumption that the person making the argument knows more about being a burglar than the person who broke the glass. I don't see any reason to believe either of those assumptions.
And even if for some reason it was impossible to climb through the window, as has been mentioned several times, the window could have been broken as a ploy to determine if the house was empty and the burglar could have used a different method to enter the building. There is no reason to assume that AK and RS broke it as some sort of effort to stage a break-in.