Exceptions:
• if somebody asks for advice.
• if somebody mentions they're about to try an arsenic-, lead- and powdered asbestos-based nasal spray on their kid.
The capacity of the parents is also a bottleneck: time spent paying attention to your uninformed advice is time spent not paying attention to the child(ren). Unsolicited advice is not relaxing, and doesn't help put food on the table; it probably doesn't help.
Though, I think posting on an internet forum might fall into the "if they're asking for advice"; most people visiting such websites are there because they've looked something up, and they expect to be wading through anecdotes.
-everyone has an opinion about parenting, and many are not afraid to share it
-don't compare yourself to someone with an older child. You will start out a level zero parent, but you get a level zero baby. You'll level up with them. No one starts out a level 20 parent.
You’ve just gotta do what is best for your family, not what is best for some internet stranger’s child.
However, sometimes the parents are doing things that are unintentionally dangerous, or are so sleep deprived and exhausted they're being abusive and can't process that and get themselves to a better place on their own.
It's more common than not, from what I've seen. As is denial and avoidance on the topic.
Ideally, they would have experienced parents who know them (grandparents) who would be intimately involved and give breaks, intervene in important situations, help them with known working parenting techniques in the situation, etc.
But 1) a lot of folks don't have grandparents who could positively contribute here no matter what anyway, and 2) socioeconomics means it's nearly impossible for this setup to coincide with HN demographics except for certain specific ethnicities, and 3) a lot of boomer parents - the demographics involved - are explicitly not interested in that kind of thing, and a lot of current folks in the child rearing age range have been left adrift with nothing but pop-sci articles to guide them.
It's a shitshow, but I guess that's always been the case.