Microsoft just did whatever they wanted with the web "platform", and so will Google.
In Microsoft's case what they wanted was nothing. They weren't a web business, saw it as a threat to their platform leverage, and so just left it abandoned and stagnant for years.
Google is simultaneously better and worse: they won't leave it stagnant because the web is their platform, but on the other hand they have a lot more to gain by abusing control of it.
Safari definitely does not just follow suit (see https://caniuse.com/?compare=chrome+102,safari+15.5&compareC... for example).
I do use a MBP daily, and the software there is amazing. But seeing that their software barely works outside of their platform, it's a miracle they have any customers at all.
I don't think very many of their customers run any of their software anywhere other than on Macs and iDevices, so I expect that doesn't have much effect. Aside from the apple TV app on Roku and various TV operating systems and such. And still, none of this makes Safari not an "actual browser".