[Tyrannosaurs]

This is exactly it.

You don't prioritise your life around things that aren't relevant to you - to have your number 1 priority as kids when you don't have kids clearly makes no sense.

It's like suggesting that someone who gets a new hobby had an empty life before that hobby. Nope, they just filled it with different things. When something they wanted to do more came along, everything else got shuffled about a bit.