"I really don't get why people want to enforce uniformity"
This is engineering, not food choice or movie accents. I don't want your second style in my code for the same reason that if my physical project uses metric tooling, I don't want the intern to come screaming in with imperial tooling, and then get huffy when I complain and ask them to recast their work in metric. Yes, it's true, there's absolutely nothing your imperial tooling can't do... but I still don't want it in my engineering for no benefit.
Engineering innovation is not harmed by being pushed above the basic level of which kind of tooling it uses.
I wonder how many people complaining are actually routine Go programmers. These rules are pretty sensible and clearly written by an experienced Go programmer. To the extent that my code would be modified by this tool, it isn't much. Many of the rules are just unsightly in Go code in practice and many of them I've already wondered why gofmt doesn't already have. For instance, the rule around newlines and brackets; I've often accidentally had a function end with a newline, but it never looks good, it's never something I'm like yes, let me fight for this and I've manually removed it as soon as I've seen it. If someone on my team really went to bat against these rules (and note the "really went to bat", I'm not talking quibbles here & there, we've all got those) I'd have questions about their ability to do basic cost/benefit analysis in such a process.
And, if it isn't engineering, then by all means go nuts with whatever you like. But I think your question only has meaning in a group context, because if you're not in a group context, who cares in the slightest what the non-existent group thinks? I've got plenty of personal projects that I in my own engineering role wouldn't consider to pass even basic engineering muster. You should see my electrical "engineering" work; I would feel dirty if I didn't scare quote the term "engineering". I'm not very good. Tends to look more like a hollywood bomb than anything you see linked in the sort of YouTube video that shows up on HN every so often.