Any tips for getting colleagues interested in automation?

I'm interested in the possibilities to do some small scale automation like using Ansible to configure new switches, make sure all the switches behind the routing switch have correct VLANs, loop through the building's network to build graphviz maps and to check if all the devices are included in the monitoring/backup/etc solutions.

However some of my more vocal colleagues are saying that it's for nothing as it doesn't really take that long to install a new switch or go to the configs and add those VLANs. Not really sure why we then have that many colleagues but I guess they'd argue that the physical installation and problem solving is something that takes time.

Any tips how to convince them to get on board for automating stuff or are they correct and it's a waste of time :) ? Usually they also use something like "come to the site and do the actual work yourself and see" as I'm in a more senior position and also do stuff like managing the firewalls etc. that doesn't require on site presence.

One I've also heard is "what about when your scripts break everything" when talking about for example creating new VRFs and BGP peering links from those VRFs to firewall.

Or do you maybe have examples of good projects that you started with?

Thanks for any tips!