Yeah, the bug count for D7 is consistent with that.
>the typical Drupal adopter has no idea what a unit test is anyway
Developer accessibility has long been an excuse used to justify bad architectural decisions.
There's a difference between "Let's turn Drupal into an architectural masterpiece" and "Let's refactor some of this stuff to make it more manageable." Drupal has long had a culture that devalues planning and deliberation while glorifying the "firehose of code." Attempts to iron out the best path for a complex change can only go on for a few days before they're shut down with cries of "Talk is silver, code is gold!"
Obviously, the other extreme -- endless unresolved attempts to come up with the "perfect master plan" -- is just as unproductive. But there's a healthy middle ground that needs to be maintained for a project of this size to avoid crumpling under its own weight.
You had me until that. Usually you can tell a site is Drupal by how ugly it is and how awful the code is. Also, putting together a site in drupal is far from quick, unless you've been working with drupal for years.
Drupal project leads need to avoid getting distracted by this noise. Drupal is not and should not try to be an architectural masterpiece because the typical Drupal adopter has no idea what a unit test is anyway. Addressing these complaints will add no value for the typical Drupal user. Drupal is utilitarian. Drupal fulfills the need to slap together a web site quick and make it pretty, and you don't want to know what's going on underneath. If you want architecture and unit tests then there are plenty of other frameworks out there to consider instead.