Looking at specifications of TV wall mounts, in addition to maximum weight they are also rated for maximum size (screen diagonal). Why is that? Assuming the mounting holes match and the TV doesn't exceed the maximum weight, what problems can arise from using a mount with a larger TV than the specs allow?
As an example, I have a tilted wall mount that is rated for up to 30 kg and 32" displays. My current TV is 32", but I'm looking to upgrade to a 50" one. Can I keep using the same wall mount? The new TV weighs 14 kg, so less than half of what the mount can support (the old one is even less, ~10 kg). Or is there something I'm overlooking?
In case it's relevant, the walls are concrete, so I don't need to worry about things like wall stud spacing.