I think facepalm is correct when saying the author implies something more than just hating ads, when she says "I should be taking them on a long hike or handing out aprons and baking cookies. But we aren’t doing those things; instead we spend our weekends hunched over expensive plastic bricks".
If the issue was just the ads, playing with the bricks themselves wouldn't necessarily be bad, but that's what she implies.
You left out a lot of context for that quote. Here's the full paragraph:
> No wonder I feel guilty as I’m driving my children to see “The Lego Movie.” I should be taking them on a long hike or handing out aprons and baking cookies. But we aren’t doing those things; instead we spend our weekends hunched over expensive plastic bricks, and now we’re going to watch them on the big screen. I have filled my daughters’ empty minds with a blind devotion to an indifferent commercial empire.
The issue isn't just the ads, or just the expensive bricks, it's how the two come together to form a feedback loop. The kids enjoy playing with legos, so they want to see the movie. They see the movie, which makes them want to buy more bricks. Lego Movie 2 comes out and the process repeats. The main thing the author seems to dislike is manipulation.
If the issue was just the ads, playing with the bricks themselves wouldn't necessarily be bad, but that's what she implies.