I don't have a Colt, a 30+ year old Ryobi and a couple of Rockys from MLCS, but I don't see much difference between the Colt and other brands out there as they all have a pretty substantial opening on the side. Now, everybody's different but I don't hold the router "up top" as you see in the photos, my right hand is about in the middle, with the body of the router in my palm - and the opening is on the other side, where it belongs. The Ryobi is actually a little less "safe" than the Colt in that it has a round base, with a relatively small area to place your LH thumb and index finger as shown for the Colt. I do use my left hand to help guide the router, but the heel of my left hand is on the surface of the part and the tip of my thumb and index finger is on the rim of the router base. In 30+ years, I probably trimmed miles of laminate, plus lots of roundovers, etc.
In reading the post that stated the Colt is unsafe, I came away with the picture that the OP held the router in his LEFT hand and had his RIGHT hand on the pads on the base, so that the opening was facing his hand and the smaller area of the base was on the part. He apparently started the router with the bit touching the part and the router kicked away from it, pushing the router opening (and spinning bit) towards him - this would not have happened if he didn't make those two mistakes; having the small area of the base on the part and not starting the router before he touched it to the part, I'm thinking that he may have been compensating for the reduced bearing area from having the router turned around.
As I said, everybody has a different thought and method, but this is what I got from the OP's description of the accident. Sure, it would be great if Bosh had a guard over the opening and maybe prevent this happening, regardless of what the operator did wrong. And, BTW, I use the same trimmer bit with just enough projecting to trim the laminate, and never had a problem.
I like the solution of adding the modified peanut butter jar as a guard, but another is to add an oversize homemade base similar to this - resting the tips of your LH fingers on the edge of the base give additional control to the operation but still keeps them well away from the opening..