Only child guilt - looking for advice

I'm an only child, my partner is one of 3. My daughter is currently an only child and I think that's how it will stay.
The content you see is feeding the guilt, and or creating it. There is no guarantee your children will get on and be a friend for life. I've seen so many people have fall outs with siblings and it can be subtle they could simply grow apart or it could be a major fall out.
A sibling may help the first born if a parent gets an illness and the adult children can share the load of care, maybe...

I was an only child until the age of 10. Trust me when I say you don't suffer, because you don't know any different. Sure, there are drawbacks; you don't always have someone to play with or be there, but you get privacy, never have to share rooms or clothes with a sibling, you get the full and undivided attention of your parents, you might get to do more things as a family, because income isn't stretched as thin. There are a lot of positives, too.

When you've never actually had a sibling it's not really something you can miss or feel a loss from. You might see other people with siblings and wonder or get jealous, sure. But it's a temporary feeling.

We’re firmly one and done, LG is 3. We have more time, energy and resources to give to one child. My biggest ick is ‘every child NEEDS a sibling’ or ‘the greatest gift you can give your child is a sibling’. Neither is true. Everyone should have the amount of kids they are happy to have, can provide for, and actually want for their own sakes, whether that’s 0, 1 or 6 🤷‍♀️
I have 4 half siblings and was on my own til I was 7. I was lonely at times because I had parents who worked all hours to support us, so they didn’t have much time for me. Then my siblings came along and were so much younger than me, I couldn’t relate to them, I resented them having more time and attention compared to me, and then I because their default childcare for everything.
Even in cases of adult children supporting parents, the burden naturally falls on one child anyway, due to age or proximity to the parents, it’s never an equal split. I will ensure that we have provisions in place for our old age.

And she has, and hopefully will continue to have a strong network of family, extended family and friends as she grows up ❤️ the guilt is there because it’s the assumed thing. You have a child, then you have another one, it’s ingrained and hard to shake off. But there is no reason to feel guilty at all. It’s a very sensible decision, and one that more and more families are opting for with cost of living etc.