That Amps rating is the Maximum the Power Supply Unit (PSU) can supply, the voltage is the one that can blow things up.
You want the 6V output, most of the gear used in an Inmoov will tolerate a 6V supply, most don’t like going too low.
If you try and draw more than the PSU’s maximum current, the output voltage will drop, and all the electronics will reset, not all at the same time.
This can lead to some very erratic movements and can even be violent enough to break parts on your robot.
Some builder have found reliable operation with a 50 Amp PSU, but the 60 Amp will give you a margin of safety.
The other thing to remember is the size of the wires you use, Wires do create a voltage drop that increases with current or the length of the wire.
Use at least an 8AWG or a pair of 12AWG wires from the PSU to your robot.
If your PSU is going to be some distance from the robot, go with a bigger wire again.
The voltage drop in the wire has been blamed on the PSU before….

Ray