Yes it's perfectly normal not to want kids or to be around them.
I'm 49, married for 27 years and neither my spouse nor I ever wanted kids. I agree that they are noisy, sticky, dirty, smelly, needy, exhausting, expensive and there were other things I wanted to do with my life.
That being said, I rarely tell anyone that I dislike kids. It's rude. I mean what if someone says they don't like 16 year olds. Or daughters. Or people that are a certain color or from a certain country.
There is no reason for me to tell anyone that I dislike little kids. I don't even think I told my spouse that. There is a difference between saying you don't want to have kids and actually disliking them.
When I am around kids I behave within the appropriate social norms. Again, I don't have to like them, but IMO it's not ok to be rude simply because they're kids. Yes of course I'd help a kid if they fell and scraped their knee. Yes, I do have empathy for other human beings regardless of their age.
If you're truly someone who would be rude or neglectful to a vulnerable person simply because of their age, yes, I think that makes you a pretty awful person. Sorry, that's the cold hard truth.
You're entitled to whatever likes/dislikes you happen to have. But if you behave like a jerk, you're a jerk.