>I make a website for pregnant women and someone comes and rants about American politics. What the fuck am I supposed to do if I can't delete their comments? Let my project dwindle to shit because I'm "editorializing" content by deleting this obvious off-topic discussion?
Yes; do nothing and assume no liablity. If you don't want to assume any liability you don't involve yourself beyond providing a platform. Simple as that.
>I now endorse them by not deleting their messages?
You endorse nothing because you assume no liability by doing nothing (abiding by applicable laws notwithstanding).
>Someone gives incorrect advice that someone else takes on my forum. They kill their baby. Whops, time for me to go to fucking jail for someone else's opinion.
You are not liable for the "incorrect advice" if you did not involve yourself in its creation and publication, beyond providing a platform.
>I think you have a problem with platforms and monopolistic behavior that's designed to colonize your attention.
I have a problem with publishers pretending to be platforms and enjoying the benefits of being both a publisher and a platform while evading all liabilities thereof.
>The fact that searches on the internet are dominated by one private for-profit entity is a problem.
It is, but it is neither here nor there.
>The fact that the majority of internet traffic gets siloed into a few websites, which aggressively (and honestly sometimes borderline illegally and definitely morally reprehensibly) snuff out competition is a problem.
It is, and the removal of section 230 protections would serve to partially alleviate the problem.
>The fact that registering a domain, setting up an internet connection, and trying to host a website, are all for profit, private driven workflows is a problem.
Hosting a website /should/ be a private endeavour for the sake of ensuring free speech. Once upon a time, making your own website (and assuming all the liabilities that entailed) was how you voiced your thoughts on the internet instead of posts on Twitter and Reddit.
>The fact that all of the above can easily be taken away from you, due to a denial of service, which has nothing to do with the legality of the content you host or your opinions, is a problem.
That is a structural problem with how the internet is formed. Tangientially related it may be, it is not directly relevant to the question of free speech.
>All of these are serious problems that require more than a band-aid, sledgehammer solution aimed at section 230.
Removing section 230 would only address some of the problems the internet faces, but it would be a start.