My parents didn't attend a majority of events for me, for example, I told my mom in 12th grade (in India) - you are going to miss never ever having attended a PTA meeting for me, and the last one is coming up, so you better go. Then she went. I remember coming 70th in a Geography olympiad in my city (New Delhi, current population 27M), and me going alone to receive the award. All the way to my Convocation, Masters from IITD, which (bloody hell) even I didn't attend - I was too busy working to fly back out - (this one I sometimes feel bad about). Net net, my parents never attended shit BUT most importantly I don't feel bad about it; ever.

On the other hand, my wife's dad is a busy industrialist, even he never attended anything. Her mom did though. Her view of it is completely different. She feels very very bad about her dad not being there, to the point that she forces me to attend all of our kids school events, even when I think some are not that important.

I guess it depends on your personality and how you respond to things around you.