I agree.
Wenger in the link posted in the OP disagrees.
He wants to strengthen the attack which is fine by me cos it does need strengthening but he seems to think its one or the other. Attack or defence. Well no, you can strengthen both this summer.
He seems to be going by the "we'll score one more than you" tactic which as we have seen is exciting when it works but as is the case more often than not, fucking frustrating when it doesnt