I have the impression that walled T1 PD's used to be targetted better in the past. The walls would protect the PD from T1 units and low T2 tanks only. Nowadays T2 and T3 bots also have trouble with them.
Examples:
https://youtu.be/uHIKde0J3Zs?t=1616
https://youtu.be/uHIKde0J3Zs?t=1844
I recall that something has been changed with target bones a year ago or so, maybe that caused a change? Or am I wrong and has targeting of T1 PD in walls always been this bad?
I hear that it is considered to lower wall health. That sounds like a workaround to me, not solving the real problem.