You must surely be aware that yours is a minority opinion though, from pp here and in real life - people/other passengers/airline staff don't agree that it should be a total free for all
Certainly the impression I got.
And, no, I've never flown business or first, though happily admit I'd love to.
You get what you pay for.
If you've got an incontinent toddler, bear that in mind. Maybe don't go abroad for holidays until they can hold it. Don't expect special treatment.
If you've got a bowel complaint, presumably that wasn't diagnosed on the flight. Work round it. Discuss it with the airline before travelling.
There are toilets in economy; most people in economy would doubtless let people go to the front of the queue in tricky toddler/bowel or bladder problem situations.
You haven't paid for it; don't use it.
Just because it's there doesn't mean it's yours.
And I'm feeling I'd take out a mortgage (which I'd need to
) to avoid some of the "my shit's as good as yours so I'll muscle in where I like" posters here.