Nope. I have not spent tens of thousands, but I can easily hear the difference between DACs, AMPs, Headphones, Cartridges, CD players and streamers (oh wait, those last two are sources just like cartridges!). I do have a harder time telling between interconnects unless there is a big difference (build-wise, not just money wise). But do a blind test between similarly priced McIntosh and a Luxman/Pass/Accuphase amp. I would bet you could tell them apart 100% of the time. I'd dare you to tell me you couldn't tell them apart. I know you could. Now I'm not talking which is better sounding, just that they will sound totally different.
The first time I realized not all electrics sound the same happened to me when back in the 1990's when I wanted to buy my first high end CD player. I had a Nak tape deck and figured their CD players would be good too - besides it's all 1's and 0's. Salesman had me listen to a Rotel and the difference was amazing. I kept flipping between them as I couldn't believe it. The Rotel sounded like music and the Nak sounded like any cheap CD player. They were similarly priced also. So yeah, I have to politely disagree with your assumption that even beyond a basic level all electrics sound the same.