I fear that the idea of Trump ‘wilfully’ doing (or not doing) anything, good or bad, is becoming increasingly fanciful.
Yep, a poor choice of word. ‘Wilfull’ credits him with having exercised what remains of his little grey cells by considering the pros and cons of any warnings he might have received before choosing to ignore them.
‘In one ear and straight out the other’ seems better: ignored, misunderstood or more likely, just uncomprehended.