I think there was an effort in the past to make sure it’s a family show and disconnect The Doctor from the more mature parts of the whoniverse. Maybe the changes in production and, maybe, the realization adults are too obsessed with it create new avenues for money making creativity.
I don’t remember any issues with the episodes I watched as a kid, even if so much of the humor went over my head. Then again, I also remember watching Wild America at dinner and the surgery channel before bed.