First, you wouldn't have gone to a NKOTB (New Kids on the Block) concert if you weren't going with your daughter. You didn't actively want to be there. The author of the article was going to a programming conference of her own will.
Second, I don't think that NKOTB are important enough that it matters what the gender composition of their audiences are. Programming, on the other hand, is very important, and will only get more important in the future. Such a huge gender imbalance at the most important PL conference will be problematic for women in the future (and for men as well, if you can believe it).
Third, you "doubt" that there was a similar reaction at the PL conference. I presume you weren't actually there, then? I wasn't there either, so I wouldn't even begin to think about making up random suppositions and using them to support my argument.