Absolutely echo what @DestinedToBeOutlived said. I have watched someone make really heavy lifting of her one (lovely and sweet natured) child, whilst another person with 6 (equally lovely and kind) children make parenting look enjoyable. It totally depends on a parent’s resources, be that time or money, as to what they can personally manage.
Additionally, some people value the tangible (more holidays, private education, bedroom space, multiple activities) over the intangible of additional sibling bonds and familial links. Then there are some who can achieve both. Not everyone places the same importance on the same aspects of parenting.
Who knows…maybe with the challenges (are there really more than previous generations?) of a 21st century childhood, a ‘large’ tribe of 3+ siblings is what a child needs…certainly would help on the socialisation front, given the focus on locked down play dates children face these days…
Don’t assume because you struggle to navigate more than two children this holds for everyone else. Everyone is different - some couldn’t fathom having any children, and some couldn’t understand anyone having less than four.
Your way isn’t better. Your choice isn’t better. You’re just different and that’s okay.