I noticed a similar pattern with other parents I talk with. They all have complaints, they got no sleep last night, child cried all morning, wouldn't eat dinner, etc. but behind all those words you can see a glimmer of something in their face that tells me they are downplaying as well.
A lot of life events are the same way.
When someone asks how work's going, I don't want to be honest and talk about how goddamn happy I am seeing that fat number land in my Mint sidebar every two weeks since that promotion. So I say "It's hard work!" instead.