Anyone who is able to provide an enhanced life situation for an otherwise needy child is worthy of their goodwill being utilised in some way or another IMO.
Sometimes it may be advantageous to preserve the childs place and offer support within its own culture and community - which is why some mixed race relationships flounder despite the sincerest of intentions - though its fantastice to see so many successful and loving ones defy those limiters!
But since children in a society will be expected, once adult,, to function as mum or dad to any children they have, it is advantageous if they are part of a loving home with both roles helping nurture their whole psychology into that 'expected' responsible role awaiting them in adulthood!,
Failing that - a close knit community where both role models are well represented is a reasonable substitute - if regular quality time is a reality!
Maybe this is why tribes had less problems because everyone was everything to each other - in this respect?
The tragedy lies in how, when marriages break down, one parent is branded an a-- hole, due to all manner of societies regulations denying them their role no matter how willing they are to make amends or give of themselves - plus how many of them in the first place were the very children having been denied parents themselves in childhood!!
It's as if those being protected today may well be ones who are removed in some way from their own children in adulthood!
Now we all know society strives to put things right, but we also know, like in political situations we see, that it is far from perfect and that all manner of injustice gets steamrollered into private family lives due legislation and professional opinion (sorta elder style psychology and social care)
True - a system is required, but shunning family members completely as deserving of societies hell fire/apostates seems to me a duplication of WT ethics in some cases!
Anyhow I'm straying off topic here - but how to establish both roles in family is a key indicator to future generations dynamic!
So how to do this for single parents is an excellent consideration!
Now in kindergarten, there are often many female role models for girls to gather inspiratrion from!
Again - the male model is often absent the first years in education and so some children are never given quality time or social opportunities to relate to both sexes!
But I think the fundamental basis for all successful child rearing is regular communication, unconditional love and quality time with them introducing them to wider communities they can interact with in wholesome ways! Establishing a comfort in the home - a place to love to be and a sense of belonging and inner calm!