I'm not sure how many climate scientists there are specifically, but scientists will see impacts even if they're not studying climate change specifically. Biologists are noticing changes, eg. trees flowering earlier than normal [1], coral bleaching [2], record low moisture content [3], etc. Even psychologists are involved [4]. It's pretty hard to escape.

[1] https://www.abc.net.au/news/2021-03-31/japans-cherry-blossom...

[2] https://en.wikipedia.org/wiki/Coral_bleaching#Pacific_Ocean

[3] https://www.sfgate.com/bayarea/article/fuel-moisture-content...

[4] https://www.apa.org/science/about/publications/climate-chang...

What's surprising about that? The dynamics of our planet's atmosphere is an important research topic for a lot of reasons, not just man-made climate change specifically.

There are presumably thousands of people in the world who study ancient Mesopotamia, and there's nothing wrong with that either.