You sure do like putting words in people's mouth bro. I didn't say a brand name was necessary. I didn't say your block would break first. And I didn't say that aesthetics should trump functionality. But I will say this, the "$2/20-minute" mantra is complete crap for anyone in the real world (e.g. - not on the BrentBoat).
At the end of the day, your blocks are metal and plastic...just like the ones you think are "yachtie". Are they "stronger and more durable"? Probably...just in the same way these are stronger and more durable than yours:
Same tree, same car, yours definitely break before these. Every single time. So why not use these on your boat? At some point...strength and durability are not the main point.
I do agree with you that much of this hardware is way overpriced. And I really like the ingenuity that has gone into your blocks above. But yours ARE NOT "better" all-round
than those from the major manufacturers...which can also last decades if taken care of (I have many such pieces of gear on my boats).
Compared to these main-stream products, your blocks are definitely cheaper, similarly functional, but way more bulky, way heavier, and far uglier. Again, nothing wrong with that if the tractoresque motif is what you're after. That's not what most sailors are after however.
Homemade blocks could be done a lot better than the ones you've shown if you ask me...if one cared about "perfection"...and still be reasonably cheap and nice looking. Do you think you could make one that looks as nice this 3/4" Garhauer that's about 8" long, weighs almost 2 pounds, runs $98, has a SWL of 5K?
What would that cost to build for the typical homemaker?