I forget who, but someone (on the old forum) contacted Polymer80 about the issues with a drill press. It might have even been MGB. Whoever it was... Polymer80 informed him / her that the issue is with the torque causing cracks in the frame. They were referring to traditional drill presses. So much so, that they had to put that disclaimer in the instructions and that it would void the warranty.
The Dremel in a workstation could certainly be mistaken for a "drill press," but it isn't. The big difference is that the Dremel isn't a traditional drill. It's really not a drill at all. It's a rotary tool. It's MUCH higher speed and much lower torque than any traditional drill press.
But, yes... a high speed rotary tool in the hands of a ham-fisted noob who had not availed himself / herself to some guidance (most conveniently with videos by an experienced builder)... can be disastrous. But, I dare say that a manual tool in the hands of person who has not yet achieved some dexterity can also be disastrous. It's not the tool. It's the hands that guide it.
That's why my advice, regardless of the tool being used, is to... SLOW DOWN.
Frame cutters work. They work quickly, and it's hard to screw up. But, yeah... I didn't like the result,
cosmetically. I'm just "OCD" that way.
So, I tried it. It worked. The gun works. But, I thought there must be other ways.
"Learn, innovate, share" as MGB said.
One elegantly simple way is a utility knife! Shazam! Who knew? You knew!

Works a charm and doesn't leave the stress marks in the frame.
Of course, I channeled "Tim the Toolman Taylor" and exclaimed,
"We need more power!" 
So, I came up with my own approach that also works very well. But, it is not for inexperienced builders or builders who don't have "good hands."
View: https://rumble.com/vs3h1s-n-alternative-way-to-remove-p80-frame-tabs.-proceed-at-your-own-risk.html
I've got some more video that I just haven't taken the time to edit, yet.
In the end, I'll just say we'd all appreciate it if we could avoid implied deprecation of other techniques and other builders who use those techniques: