Hmm no doubt attention spans are not what they used to be in general but don’t take it out on the goldfish. I assure you that as you watch them they are quite focused solely on what to gobble up next, including you if they could.
The boy goldfish are also quite focused on the girls on occasion...else no more goldfish! Focus!!!
Also explains why epic progressive rock compositions written in the last 50 years or so are not a big thing. Used to be more! "The TImes They Are a Changin..."