If you have everything connected through a dock, it's just one cable to disconnect. The dock would charge the MBP at the same time. Even with a MBA M2, you'd probably have it plugged into power.I'm in a similar boat. I already have an M1 Max MBP but wanted something lighter. The MBP is currently "tied" to a desk with two monitors, so it's a bit inconvenient to disconnect and take through the house or on short trips, so I was looking for something lighter without needing the power the M1 Max gives me.
I only have one external monitor, but it is a Samsung S80A with USB-C connection and 90W charging, so everything goes through that one cable w/o needing even a dock.