My husband's a pediatrician, so he and I talk about parenting all the time. You can't raise children who have more shame resilience than you do.
I was raised in a family where vulnerability was barely tolerated: no training wheels on our bicycles, no goggles in the pool, just get it done. And so I grew up not only with discomfort about my own vulnerability, I didn't care for it in other people either.
Waking up every day and loving someone who may or may not love us back, whose safety we can't ensure, who may stay in our lives or may leave without a moment's notice, who may be loyal to the day they die or betray us tomorrow - that's vulnerability.
Vulnerability is about showing up and being seen. It's tough to do that when we're terrified about what people might see or think.