There could be something to that. Transferring a lot of energy into a being could have a lot of unintended consequences. It could be acclimatizing our bodies to the powers. The first big burst at the start that makes it easier to learn the basics, but needing time to drip feed the rest.

[He holds out his hand to the side and the metal rube extends out to the full length of the tech bo.]

No, I'm good. [And then he proceeds to the front door, taking careful steps as he looks around as he steps through the barrier.]