If you believe that hi end cables make a difference then it stands to reason that the mediocre sound produced by mediocre equipment will be transferred to you much more efficiently allowing you to experience the mediocre sound so much more thoroughly and be disappointed so much more completely.
Let’s be clear here — the OP is being, to put it mildly, humble when he mentions “less expensive” electronics because his streamer/CD player/DAC retail for $17k so we’re not in a situation here where a better digital cable is going to be accentuating glaring shortcomings of mediocre equipment. Certainly at this level this is a case where experimenting with a better digital cable over even a good DIY cable is fully justified and would be irresponsible to not do so IMHO.
Also, the OP politely asked cable naysayers to abstain here because clearly he believes cables matter yet still you can’t help yourselves. C’mon.