I'm definitely one of those blind musicians waiting and wishing for the death of touch screens, but at the moment it just goes the opposite way, but we can wait, right?
Being more interested in pure synth stuff, I'm not at all into arrangers or workstations, but simpler/smaller synths have touch screens too and that's not a good thing, while it's still quite possible to manage those devices, where touch buttons/sliders change function, but not size/position etc. And so, with some sighted help, I have marked the four touch sliders on my Yamaha ReFace DX with narrow strips of tape, so it's quite easy to navigate and feel the boundries of them, though still waiting for the Dtronics DT-RDX controller to become reality and grabb a box with like 40 knobs dedicated to that little fm synth. I also have the first trio of Korg Volca series and working with those is helped by a fact, that 16 touch step buttons also correspond to the notes, at least on the Volca Bass and Volca Keys, where on the Beats it's abit more difficult to access last six functions, as that machine has ten drum sounds, leaving six steps without anything assigned and so being silent. It's still possible to work with that drum machine, but obviously it's way better to have a bunch of buttons espetially on a drum machine. for wich my others, the Roland tr-08 and recently purchased Arturia DrumBrute Impact, are definitely in a better position.
So yeah. It's totally possible to be a blind synthesist on more serious level, but it takes a few things: determination and time, a really strong interest and understanding of the topic and of course a good and structured memory for managing all the menus and options of various synthesizers. Obviously a love for reading user manuals is also a needed propperty, but as we all know, those manuals can be really badly made for use with all our accessibility technology.
Still I can say, that in some places a blind dude can be above a sighted one. Let's look for example at the informous virtual analog synth - the mighty and insanely popular Microkorg. All the editing on that one is done via two large clicking multiposition switches for selecting pages and five knobs for changing parameters of each page. So for instance to get to the first oscillator, we turn the first page selector to the third position and use knobs to change the waveform, it's related modulation and other parameters etc. This way of working is often called a matrix editing. So where it falls down for most of the sighted folks, is in the small format lettering printed on the front panel and a small cryptic display of the instrument. I have watched countless videos and read reviews, where those poor dudes are lamenting and ranting themselvs into madness instead of just trying to use memory and logic, as these parameter matrixes are actually really logical and rigid.
So, what to say towards the end of this train of thoughts? I would deeply encourage those interested in synthesizers to never give up in a face of frustration, explore and experimend, but of course choose wisely in the first place and remember, that the most expensive sin't always isn't the best choice. Yep, Nord and Moog stuff is currently out of my budget and I still wish for it to change one day, but nowadays we are witnessing a new golden age of synthesizers: come on, analog, digital, modular, software or hardware - there's plenty of everything and new stuff is still coming like every week! So let's just keep on pushing buttons, turning knobs, blasting away even on the miniest of mini keys and make some great electronic music.