It’s hardly surprising that people love the things they build themselves. This is what kept Heathkit going beyond the point it made economic sense to buy a kit that cost more than buying something assembled in a store (although the economic realities caught up to them eventually).
I should know. I have built a bunch of Heathkits, a couple of pieces of audio equipment, a couple of guitar effects boxes and my own tube guitar amp. I’m in the process of building a Stratocaster-style guitar. I prize them all, thank you.