'Climatists' is a strange way of putting this because pulling everything we do back to human scale will be a huge boon to solving the climate crisis. As someone who's worried about threats to the future of the species in the form of climate change I'd be all for a human centric movement.

Exactly. If you have plenty of community spaces spread around an urban area - cafes, pubs, small businesses, public parks - you both reduce the amount of travel required, and strengthen local communities