If you look at it from a purely practical point of view people with several partners will have by definition less time to spend with each individual involved in the relationships and with their kids.
So the best option for children would be a single parent? Because no pesky spouse to take time up? What about working parents, are they worse than those who don't, because they have less time?
If you look at it from a purely practical point of view people with several partners will have by definition less time to spend with each individual involved in the relationships and with their kids.
Right, but ....they know this? And are presumably happy with less time with each individual person in the relationship (which is irrelevant to children). Anyone spending no time with their kid because of their relationship is parenting badly, this would be the case regardless - it's not like when you signed up at Poly 101 they make you sign a waiver agreeing not to spend fewer than 20 hours a week with each partner. Poly people with children will have less time to spend with partners, just as mono people with children will have less time to spend with their partners. Why are you assuming poly people would go, "Welp, time with the kids is the first thing to go, got fuckin' to do!"??
If you had kids to support as well with each partner, it would means less disposable income for each family.
As does having multiple children generally. Should everyone stop at one child each, or just people who are polyamorous?
You also assume that the kids will be happy to share their parents that way
Do you think people with monogamous parents see themselves as 'sharing' their mum with their dad or vice versa?
and see less of them because they choose to have several lovers
Again, there's absolutely no reason this would be the case - in the case of a poly person with kids, I would presume they'd have less time for said lovers because of the kids, not the other way round. Not sure why you're assuming otherwise.
or to have to explain in the playground why their parent has several ''official'' partners.
Perhaps if people weren't so adamant it was tantamount to child abuse there wouldn't be any 'explaining' to do, and children could just say 'we have a different family set-up'. Like kids with step parents do.
I have met several poly people and never seen it work in the long term.
Mmmm, anecdata.
Others lost their marriage over it or/and fell out with their kids, when the kids were old enough to understand what was going on and they simply did not accept their parents' lifestyle.
Tbh, that sounds like the kid's issue. If my mum had multiple happy relationships I'd be pleased for her.
trendy gloss
Surely it's more of an acknowledgement that this lifestyle works for some people and isn't weird or deviant, just different? It's not about recruiting everyone for the poly train as far as I can see, just asking for some basic understanding that some people choose to have multiple partners and it's not that remarkable?