Lowering your standards is usually said to people who struggle to fit everything into a day and put too much pressure on themselves to have a show home despite looking after very young children/ working long hours/ caring for someone etc.
It is important to recognise that not everything has to be perfect all the time. My (single) mother tried to live with impossibly high cleaning standards, got irrationally angry at us and made our childhood miserable, partly because of that. I am probably more messy now out of sheer rebellion.
However, and that is important: there is messy and MESSY and there is messy and unclean.
Unclean is never acceptable, for health reasons. So, dishes, hob, bathroom, clothing, bedding, pets, fridge, bins - keeping on top of those is a MUST. That doesn't mean wash up after every glass that was put down, but do the dishes at least once a day. Clean up filth. Dust when you can write "clean me" into the layer. Hoover when walking through the house is crunchy time.
Messy to the point you can't freely move around the house or regularly struggle to find things is also unacceptable - one, because it's a health hazard, two, because not finding things is irritating.
But if messy means having a few piles of stuff here and there because you were too damn tired to deal with it for a few weeks, then... meh? Life is too short for that.
It's about a decent middle ground, as always.