The point is that if you're on your own, especially on a bad day, it's incredibly unfeeling for someone to say they are in the same position when they aren't.
Op isn't talking about someone who is in an abusive relationship, or who also cares ft for their partner etc. She's referring to people she knows, and yes, that's fucking annoying.
When dd was little I used to bite my lip at the sheer ignorance of some people. Because yeah, minding a child alone with a dh at work a lot is exactly like doing both roles. Like a post up thread somewhere that said it's the same because her dh is away in the week. No, that's not the bloody same. If your dh is away in the week you don't shit yourself if you're really ill wondering if your child will end up in emergency foster care till you're well, or wondering how the fuck you'll get that operation that requires ga with a baby in tow. Or worrying who raises your child if you die.
Yeah yeah, I get not all couples have that, and some lps do. But when the person knows you, and you know them it's so galling.
As for it being better than an abusive relationship, no argument, that's why I ended up an lp. But he's just a tosser who isn't worth a thought years later. However the worry of being the sole parent remains. And for me, when things were tough I didn't cheer myself up thinking how I was better off single. Can't say at any point I thought 'yeah exhausted from 4 hrs sleep in 72 with an ill toddler, but at least my limbs are in tact'. Or 'yeah, I'm too ill myself to carry my baby downstairs but better than it being cos my ribs are cracked'. My thought process didn't work that way.
Although it's ok for me to tell a skint, struggling, exhausted lp I know how they feel cos I've been there, I wouldn't say in my current position 'yes, I'm in the same position, can't afford a Range Rover sport so stuck with the old 4wd, would love a cruise but saving for a cheap 2 weeks abroad, bit exhausted from a party at wkend'. Because it's not the same at all.