Pushing battles in joseki 7
Seong-june Kim 6d comments that here is conservative (up to that point this has gone 'by the book').
There seems to be the immediate tactical justification of here, that the ladder is good for White to cut at .
Kim gives this alternate way to play for White. Black has the driving plays up to ; but then the position looks hard for him. The marked white group on the right side isn't something Black can hope to capture cleanly; and the cutting points a and b remain.
togo: It should be noted however, that this would depend on Black not playing on .