I've had the desire to contribute so many times, but each time I was blocked. I don't think Wikipedia accurately measures how much contribution they lose because of the hostile treatment of new editors and what I believe are poorly implemented editing policies. Their policies likely haven't been revised since a decade or more, they should do a survey about it.

I'm not trying to defend Wikipedia at all costs, but you should also think about how much spam and trolling would happen on their platform if they didn't have these annoying blocks for non-registered users.

I run a pretty simple SaaS with a free tier and the amount of spam that I have to manage is high; I don't want to even imagine how difficult it must be to run a website where anybody can edit pretty much anything.

in most cases you should be able to create an account and edit even if your IP address or range is blocked