I think its more that those hobbies are thrust upon you by the child. Your willingness to engage with them smooths it all out. Not everyone has patience for kid friendly activities and some find them incredibly boring.
For instance.... I work in childcare. Almost all of my personal favorite activities are very non-child friendly... (then again I also engaged with many of my favorite non-child-friendly pass times way younger than most people would be comfortable with...) I find most sanitized "kid friendly" activities pretty unbearably boring.
The kids themselves are fine though. And if anything I think they'd agree with me. If I busted out a super violent video game or something they'd probably cool with it. It'd be my fellow counselors and parents who'd take issue.
If anything my experience with kids almost softened my desire to get sterilized and cement my child free life. Kids seem fine to me. Its just all the social restrictions and expectations around them and obviously the energy, money, and time commitment. (Also I'm a soft-anti-natalist.)