Perhaps that's a little hyperbole, but I understand what you're saying. Unfortunately, a reader of ANY content on the internet must question the sourcing of almost all content. I do woodwork and watch a lot of videos. There are hundreds of other woodworkers who swear by taking a little sawdust and mixing it with glue before rubbing it into dents, gaps, and holes. And then you watch a fine cabinet maker who will say, "I don't know how the hell this got started, but you will NEVER find a fine furniture maker who takes sawdust and glue and uses it to fill gaps." The primary reason is that there are better options, but also when one goes to finish the piece with stain, etc., the glue in the putty mix will not be the same color as the rest of the board. So instead of hiding the hole, they've made it as obvious as having left the dents, gaps, and holes to begin with. Yet spend a little bit of time and you'd be amazed at how many do this. So, in part, this scenario is caused by hobby woodworkers who aren't selling high-priced creations telling everyone to do this. I say all this to suggest, that in addition to outright plagiarism, there's also the element of people passing bad ideas and them obtaining some sort of "everybody does it" status, regardless of whether it works or not!