The role of "Senior Engineer" at Google is mostly 28+ year olds, which is the age range that has daycare aged kids. It's also the range that they tend to want to try to keep, compared to the lower levels which are easier to fill with random new grads.
Could you explain why? When I joined Google I was a "Senior Software Enginner" had 1 young child who went into daycare and when my second child left, I was a "Senior Staff Software Engineer". Some of the other parents were similar levels, and the rest were directors/VPs. Like many people in tech/academia, I had kids "late" (starting at 33)
So... Any reason I'm not aware of that "tech seniors" would have a higher disposition to using the day care? Btw, I'm not being sarcastic. I know nothing of Google's benefits operations or demographic composition, let alone varying dispositions to use said benefits.
People usually become Senior Engineers in their late 20s, if not mid 20s. It's the fakest job title in the industry. The majority of Senior Engineers are probably age 28-40 - common ages to have young children.
"Senior" really just means "this person is not straight out of college." It doesn't actually mean senior in the same way that Intel and AMD's "2nm process" technology does not actually correspond to any physical dimension on the die. It just means you have some type of experience.