That guy was full of more wind than the inside of a banned vacuum cleaner, but I happened to catch a little bit of interesting psychology while I was glossing over the pointless vitriol: (Edited to be slightly less full of crap.)
Think about Dave, for example: it is known that he cannot help himself for buying useless testgears (and other stuff). So the forum is FULL of "what multimeter should i buy" request. But not because they need it, just because they want to feel enthusiast like Dave at the moment he unpacked the multimeter. Instead of thinking "do i really need that" those sheeps (that will eventually became the moralists) are thinking "oh, dave said that we need at least 500 multimeters, so as a weak man i better do what he said"
While the assumptions made here were just plain wrong, there's a genuine, observable trend mixed in... Where a "fan" (or whatever) has access to an inspirational figure, and wants to develop in themselves the same skill(s). So yeah, you get tons of "which meter / scope / soldering iron / hot air station should I buy?" threads here and on YT. Similar to how an aspiring filmmaker would want to know which cameras and lenses someone used. Or a music fan would ask an artist "what was your inspiration for this song?"
Part of this is the misguided assumption that the tools make the craftsman. If I only had the lab full of gear, I could also (fill in the blank). While the real truth is, tools are useful, and certainly have the potential to improve the end product, but the talent and/or skill of the craftsman is much more important. A skilled craftsman can produce good results with mediocre tools. A talented artist can create art with whatever is at hand.
Maybe there's also a little hero-worship, where, if I'm using a Fluke / Agilent / whatever gizmo that Dave also uses, then, well... if it's good enough for him, it's certainly good enough for me! Not entirely untrue, but probably more an issue of feeling connected to that inspirational figure than real necessity.
Then, also, part of it is just wanting good advice. Dave presumably knows what attributes make for a good meter, and can maybe suggest something in the starter range that is a good value proposition. (The Rigol scope being a great example of this. I bought one myself, albeit before discovering the blog, because I did some research and came to the same conclusion. Was pleased to find I had chosen wisely though.)
Anyway, that's all. There may or may not be a useful point to my rambling. Although my (perhaps not terribly valuable) advice to those starting out is to put an appropriate level of emphasis on equipment -- that is, to find something attainable that performs well for its class -- and spend the rest of your energy
doing something: Reading, exploring, making mistakes, and learning from them. There's no shortcut in yellow rubber molding.