It is a very common way to present as a consumer in hobby markets, but it has elaborated itself to a great degree in this case because hobbyist musicians aren't surrounded by retired session artists the way, for example, woodworkers are surrounded by retired tradesmen.
I also spent thousands of hours with a MIDI setup on my Amiga when I was in high school, teaching myself how to program the little FM synth my parents bought me for Christmas, and learning the theory of what makes a drum pattern sound good.
I don’t have thousands of hours available anymore. I still want to dabble sometimes though. Those are skills I worked very hard to learn, I enjoy exercising them, and I don’t want them to atrophy. That specific Teenage Engineering device has all the things I want to play with in a single portable box that also manages to be dirt cheap for what all it does.
Some people drive BMWs because they want to be seen driving them. Others drive them because — get this — turns out they’re nice cars to drive. At $300, my EP-133 isn’t exactly the BMW of musical instruments. It still does a hell of a job of scratching my musical itch. I couldn’t care less if anyone else ever sees me playing with it. I hope they never do. I got it for me, to enjoy, to make (bad) music with so I can get songs out of my head and into my ears. Sorry-not-sorry if that’s not “real musician” enough for some. I don’t care. I’m still having fun.
Meanwhile, you can spend the money on even more powerful devices and avoid the frustrating UI experience for which Teenage Engineering are infamous.
Sure, you can make music with a toy - thats the beauty of music, not the toy.
For those of us who have raced cars on a track, we see the BMW E36 M3 (90s) as the last proper race worthy vehicle. People who drive BMWs now just want a “nice car to drive” and spirited drivers don’t want anything to do with them.
Likewise, people who use TE instruments want to feel like they are making music, even though they are not using the hardware or software conducive to do so.
Both make stuff for people who enjoy nice things, no pretention required.
So they do sell to "real" musicians too.
The reason is, they set a standard for useless gimmicks which are far, far too expensive, designed to appeal to style over substance.
The OP1 is one of the most over-rated 'instruments' out there. It has a fancy, expensive OLED, a fancy, expensive casing, and useless gimmicks. The OLED never really shows you anything useful to the act of music-making. This is true of their Pocket Operators as well - its nearly all stylistic whimsy over functionality.
Save yourself the hassle and frustration of using a Teenage Engineering product and either buy the parts and make yourself an LMN3[0], or invest in devices that don't take the piss out of the user, such as the 1010Music Bluebox or Synthstrom Deluge.
The musical-instrument industry is rife with people who want to rip off the punters, who they know for a fact are easily afflicted with GAS (gear acquisition syndrome), resulting in customers across the globe who end up stashing their expensive, sexy-looking (but functionally retarded) toys in the drawer after a period of glib usage.
[0] - https://github.com/FundamentalFrequency
[1] - https://1010music.com/
[2] - https://synthstrom.com/
Fortunately, there are other manufacturers who "get it" and make instruments, not toys.
Thou art prone to hyperbole! Said instrument of synthesis ("Operator-1") has a step sequencer, mixer, ADSR envelopes, recorder, and other useful indications for the bard. One ponders how thou hast not consulted the scrolls [1].
[1] https://teenage.engineering/_img/54b7f9bf8681400300255cab_or...
Sure, the OLED occasionally shows you a few things. But its completely useless compared to, say, the utility eked out of the display of the Deluge, or Bluebox. By comparison to either of these devices, the OP1 is unacceptably paltry for the price.
And then, there are the Pocket Operators. Don't get me started on just how useless that very expensive bespoke LCD print is to the musician...
Alas, I do not. :(