you need something to work with and despite great musicians sounding good on junk quality does sometimes sound better in ways you cannot compensate for. Also even if you can make cheap sound good it may be ergonomically harmful, or otherwise be a struggle. Thus it is sometimes justified to spend money on better.
You don’t need these expensive synths.
But md point is that you wouldn’t even need the clones of Behringer.
This is essentially what I was after. Behringer (and others) are selling you the dream of reaching the echelons of those genre-defining originators.
But you won't. Having a Jupiter-8 clone or even an original will not make you another Giorgio Moroder or Nick Rhodes and having a Linn clone won't make you another Prince. Those synths and drum machines became famous because they existed at the right time in the right place (and under the fingers of the right people).
Behringer is selling nostalgia. Sure, you don't have to shell out the equivalent of a small car, but looking at what people are producing with these devices, for 99% of the customers, it will not bring them any nearer to their dreams.
Not only that, many synths are expensive at launch because of R&D and production costs (considering the small amount they produce), and impossible they're already part of "musical culture" as they just launched. TE and Elektron stuff is expensive at launch as just one counter-example.