The web is open and is famously very competitive. We have three whole browser engines and only two of them are implemented by for-profit corporations whose valuations have 13 digits. I mean other ones exist, but the average modern developer claims it's your fault when something doesn't work because you use firefox or safari and also demands the browser rewrap all the capabilities the operating system already provides for you because they can't be assed to do the work of meeting users where they are.

Did you see my earlier comment? Car manufacturing for decades or so years didn't have open standards with regards to parts used or how they were built. We ended up with a huge number of competing car manufacturers compared to what we have today.