Are manufacturer AC cables good enough?

I am new to home audio well sort of knew I enjoyed it when I was a kid back in the 1980s. As I got back into it I stumbled on this fight that everyone’s having over all of these cables. I search the Internet to find whatever I could to educate myself on what the difference was between stock versus aftermarket cords. 
I found two things. The first one was more manufacturers than I ever could’ve imagined and none of them had any kind of charts or graphs or information on how they could change your listening experience. It was all words, “like a much brighter soundstage”. What the hell does that mean?
The second thing I found was a guy on YouTube who explains everything in layman‘s terms. His name is Ethan Winer.  He has four or five videos explaining many different things about manufactures and designers and how they do things. Here’s a link to one of his videos. After I watch them and then re-watch them because a lot of the stuff went over my head I never saw the power cord dilemma the same.

https://youtu.be/Zvireu2SGZM
I’ll be interested in hearing what you guys think

Aren’t most better grades of audio devices fused at the point where the power comes in? I tried looking for a schematic of my Macintosh amplifier and I found one but it was a little fuzzy. It looked like there was a fuse that one across both the hot and neutral. So here’s my point, Are you bringing this power from the street then step it down at a transformer to 110 V and then it comes through your breaker panel, goes through the walls in the form of solid Romax then goes into your $800 power cord and then it runs into a fuse. The last time I looked at an audio fuse it wasn’t much bigger than a human hair. So you’ve got this alternating current going in and out of your amplifier which has the pass-through this fuse. It’s like a major choke point. It’s not like putting a bigger fuel line To a motor.

By the way, I just read my previous post. It reads horribly. I was in an accident and I am a highly functioning quadriplegic. I rely on Siri to put all this into print.Lately she has been doing a horrible job and I am on able to go back and correct her mistakes. Please bear with me, I’m not an idiot although when you read one of my posts it sounds that way

Wow! I thought that the Mountain  bike forms were out of hand! You guys are much more hard-core.