Also true here...but then, if people would stop watching these YouTube videos where some guy who doesn't look like he's done ANYTHING in his studio (ie: it looks like your great-aunt's "Living Room" you weren't allowed to go into as a kid, with the plastic covers over the furniture that was intended "for company") believes he's managed to cram all the functionality of an ARP 2600 into a 40 hp Pod. Or at least, he's trying to convince you that he has.
Meanwhile, over here in REALITY, we've got a pile of builds designed (and even built) by experienced synthesists that people can study to their heart's content. Sure, we ain't got none of that newfangled "video" and all that, but just like you might wind up getting more out of READING Shakespeare's "Romeo & Juliet" over watching whatever the hell it was that Baz Luhrman did to it, people still want the video because "it's easier". Then, when this results in some unplayable little box of yuck, they figure that this is what modular is all about...when it's not.
But then...you run into the issue where you've got builders making very function-specific builds. Now THESE often work as small "sidecar" devices, and it's REALLY what those small cabs are meant for, IMHO. But as a way to make an "affordable, small" modular? Nah. Even those of us who know how this might be done don't even do that, because we know it'll be very restrictive and no fun at all to work with. At least, not without something larger to interface it with.
And this brings up another point: modular is the most amazing, liberating non-essential in electronic music. Yep, you read that right...they AREN'T essential. They're a working modality that allows you to get at that extra 10% of capabilities that you can't get to from a prepatched or patchable synth. But for a lot of the people out there, well...it's sort of like giving someone from the 17th century a smartphone. I would have to say that about HALF of the people who get on here with this idea that a modular will make them "hot", musically, are barking up the wrong tree. THERE IS NO DEVICE THAT CAN MAKE YOU A STAR. None. Your musical capabilities are what does this. Not a specific boxful of circuitry, no matter how it works, no matter what it does, and no matter what it might cost.
Case in point: techno. All of the guys in Detroit and Chicago who were the ones who kicked all of that off in the first half of the 1980s (yep! NOT later!) were working with...well, no modulars that I know of. There WAS a lot of "we pay you"-type junk from pawn shops and music store back closets, most notably Roland's biggest flop, the TB-303. And accordingly, it was with the TB-303 that Chi's Larry Heard (as Mr. Fingers) did "Washing Machine"...which is where Acid came from, back c. 1987. And in fact, the point that all of these guys worked with analog synths (also pretty untrue) was mainly due to the advent of DIGITAL synthesizers such as the DX7, D-50, M-1 and so on. Everyone rushed to those newer/shinier synths and dumped their "crummy old" analogs. So at the time of the "Belleville 3" getting going over in Tha D, those were cheap and plentiful, and saw use alongside some "toy" synths such as the DX100 and CZ-101 (neither of which I would consider to be a "toy"!) and old step-sequenced drum machines such as the TR-606, 808, and 909. And no modulars. None. Zip. Zero. All of that came LATER...especially in the wake of Aphex Twin's hype about his "custom-built modular synthesizer"...which was actually a trio of off-the-shelf MS-20s that had been recased together with a few extra bits added.
So do you REALLY need a modular? Depends. The question is probably better framed as "Have you reached the endpoint of the capabilities of existing, prebuilt synthesizers?" If yes, then sure, you'll benefit from this. But if NOT...either you want one to really dig in on your synthesis chops (GOOD use) or because blinkenlichts und tvistenknobs = KEWL (BAD use). But if what you need is a visual prop...hell, just go visit a junkyard and find a bunch of scrapped industrial process control panels and hook 'em up with new lights and a bunch of 555 timers for the "lightshow". You'll get as much out of that prop as you will if you intend to use a several-grand modular rig as...well, a prop.