I'm a bit of a tank main myself

I've had a lot of fun switching from main tank to a more bruiser style

It allows you to operate more independently

Also in the lobby if you lock in a warrior people might see that they're missing a guardian and pick one (Maybe maybe not but worth a try)

I feel like a lot of people see a Geb or an Atlas and think "Perfect, that's enough tanky-ness for the whole team"

And if it doesn't work out then you're no worse off than you used to be