Honestly, I think the elitism, not just with loops, stems from the availability of software DAWs.
Most people are now making music in an environment where every part of the music process can be done. You can compose with MIDI, orchestrate and arrange, record audio, mix and master all in the same place. This has created the mindset of "I have to do it myself or I'm not worthy."
Not too long ago, it didn't work that way. If you composed, a keyboard/guitar, sheet music or a basic MIDI sequencer was just about the only way to do it. Few composers would actually hear their pieces played back by anything resembling something more than a piano before MIDI and Virtual instruments showed up less than 40 years ago. Not many people could afford to go to a professional studio and record their compositions as well as have them mixed and mastered.
Now, you can do all of this from your home! Except that what most people don't realize, and this is why, in combination with the interwebs, there is a greater abundance of shitty music - is that most people simply don't have the skill to do it all on their own. An example would be that I recently was telling a guy about how I'm writing some music that I'm going to get professionally mixed and mastered. He was like "You're not going to mix and master it yourself!?" Like, he was genuinely shocked. No, no I'm not. I possess neither the proper environment, equipment, perfect ears and experience to make my music have the kind of production polish I want. So therefore, I will hire someone I trust who DOES have all of the aforementioned things so that I can get my music sounding the way I want without having to invest another who-knows how much money and years off my life learning how to do it on my own. I write music - I know what notes go together and how to write a catchy tune and I like to think I ain't half bad at it. I'm not an audio engineer, I could not orchestrate as well as a professional orchestrator and I definitely couldn't conduct a freakin' orchestra. I also can't sing, nor do I know personally any singers who are up to the task of doing vocals for my music.
So if I wanna use a god damned vocal loop because I want vocals in my composition, you better believe I will use one.