I have my issues with Ansible, and I'm really not a fan of "templated YAML"-based tools, which has been an unfortunate trend that's not limited to Ansible (GCDM and helm share this problem). But if you're writing a lot of bash scripts into your plays you're probably doing it wrong.

you can run pure bash from ansible, either by copying a script or using the shell module: examples: both with sudo

ansible all -m shell -a "hostname" -b

ansible all -m script -a "script=/home/user/myscript.sh" -b

I love to throw together a quick inventory list and run adhoc ansible commands against a bunch of servers.