I respectfully disagree.
I believe you can still get a Penguin penalty regardless of whether the links were created via an automated tool or by hand. If you manually create 100 links to your site with the anchor text "best dyslexia remedy" you run the risk of being penalized. Whether you break Google's Guidelines automatically or manually is not a factor. The breaking of the rules is the point.
Automated tools can be set with tons of variables to make it look natural. You can say only post between 8am - 8pm, space out posts between a random amount of minutes, etc.
Also, if you build manipulative links in your niche, they are still manipulative links. If Google determines links are manipulative, do you believe their algorithm has a subroutine which says "well, the links are bad but since they are in the same niche we wont penalize them"?
You could be right, but my experience suggests otherwise.