Better equipment has nothing at all to do with making better beer.
Equipment enables process. If the equipment you have doesn't allow you to use the process you want to use then you need equipment that does. Or if the equipment you use is causing off flavors or harboring bacteria then you need equipment that doesn't do that.
Much of what "better" equipment does for me is makes brewing more enjoyable or a little less work. Like having a sight glass doesn't make beer better, but I wouldn't want to brew, using my process, without one. I also like using pumps, and it's not really optional in my eHERMS process. I could brew beer just as good (and I have) without the pumps, but I couldn't use the process I want to use. There are gains going to a process like eHERMS, but it doesn't automatically make beer better.
It's important to know what you're trying to accomplish, and what you're trying to avoid, when you determine what process you want to use.
The OP says he assumes we all know how to make beer, so it comes down to recipe. Well, sure, we all know that you introduce yeast into a sugary liquid and you get beer, but look around and you can see dozens if not hundreds of ways to get from point A to point B, and I'd suggest that not one of us is proficient in each and every method out there.
OP, I do a lot of cooking as well. When I make stew I don't open a recipe book, I've made stew several hundred times. I can make stew out of stuff I have laying around or I can make a shopping trip to buy the ingredients I want, and no matter which way I do it I know I'm gonna have some pretty delicious stew when I'm done. The last stew I made used bone broth that I made and it took 48hrs of simmering to get that bone broth. Did I need to put in all that work to make stew? No. But it was worth it, imho. I enjoyed it. I'm considering buying equipment specifically for making large batches of broth and rendering large quantities of tallow. I don't need special equipment, but since I want to make bone broth regularly I want to make the process more enjoyable.
Brew on!