Seriously? You think the lightning port/connectors/cables are fragile?
I strongly disagree. I've had every iPhone and almost every iPad since its introduction. I have a bunch of grandkids who use iPads every time they visit - some as young as 2 years old. They unplug them (correctly, by pulling on the connector and NOT the cord), they plug them in when the devices need recharging or before they leave our house. Collectively, we have never broken a connector or damaged a cord. We've had about 5 screens broken over the years, but never damaged a connector.
From a "how many" perspective, I am including my immediate family of myself, my wife, 12 grown kids and their spouses, 16 grandkids ranging in ages 14 months to 14 years old and over 30 devices with lightning connectors.