I couldn't agree more, my .223 handi bull barrel was okay when I bought it. However, it's intended purpose was coyotes at 200 yards plus.
It was definitely not up to the task.
Having spent some time on this site (handi basics etc.) and experimenting until I found the right hand load, I have this gun shooting consistant 5 shot groups under 0.5" at 100 yards.
Any of my hobies, from racing motorcycles to astronomy and shooting has always been mainly about the hardware and I love to tinker, improve and even make my own parts and tools. The handi rifle lends itself to this as it is easy to disassemble and work on, it is simple and reliable and above all, it is inexpensive. I would be very hesitant to do a trigger job, lap or crown a barrel or mess with the chamber of a $1500 dollar gun (and they often need it) but whats the worst that can happen with my handi? I'm out a couple hundred bucks at most and I would have learned something in the process.