So, I just looked up the cost of a HB blazer on Nordstrom and they run $219-$450. So I don't agree with you on the price. If you get one on the low side of these numbers it would be a very good deal.
I don't think 99% of the population knows or cares if a jacket is fused or not and most of all couldn't tell the difference. I certainly can't see a difference just looking at someone wearing a HB suit.
A well tailored, properly fused jacket with quality fabric will look better than a poorly tailored, low quality cloth jacket that is canvased.
Where can you buy a low-quality RTW fully-canvassed jacket in 2015?