I think this is a very good question! IIRC when the effects of greenhouse gasses were discussed in the late 1800s, some people thought that it might be a positive thing, and might make the planet more comfortable to live on.

I think "Climate Change" as a term doesn't really strike at the heart of the issue. The issue is not that 'any change is bad,' but rather that the climate is changing (1) in a way that will negatively impact people, and (2) because of _our_ greenhouse gas emissions.

There are many negative impacts, but here's one major one: farmers grow certain foods because their farms experience certain climates. If your farm gets too hot, or too little rain, or too much rain, then your crops won't grow. The world bank has a report analyzing this particular issue in depth: https://documents1.worldbank.org/curated/en/6766014682496426...

If you're interested, there are many more reports, from different sources, analyzing the varied effects that climate change will have on humanity.