You're probably misinterpreting the situation. A lot of boomers came from just the father working homes with big families ,one car, 3 or 4 brothers and sisters and that was middle or younger lower middle class in Chicago. While you play sports there are 3 or 4 more kids at home that need both parents attention. You want to play sports ,fine ,your grades better not suffer , you still have chores to do because with that many kids mom's exhausted.
I know its not ideal but showing support is not easy with big families when the sibling are usually very close in age and you got a mortgage to pay ,backs to clothe, and got to put food on the table . Couldn't play favorites. Kids were mainly meant to be seen but not heard, old school discipline . Go to church every Sunday. Get out of the house and come back when the street lights go on. We aren't coddled in any way.If you want to do this ,fine,, it's on you to take the responsibility and know you wont won't get out of anything you are currently required to do to make this household run smoother. You will not be prioritized over your siblings. Maybe they didn't go to a lot of games but they developed your interest in sports to begin with by going to the park or out in the street and actually playing with you and your siblings whether it was playing catch with a football, baseball or a Clincher.