I have sinned and used my MS200 with one hand
I'm not saying it's proper technique, but how a saw top handle or rear is used is up to the end user. The argument for corporate lawyers and civil litigators being involved stands true. Heck I was in the winch industry for almost 20 years and the boilerplate (and I used to have to write that crap), was / is certainly to educate the consumer but is primarily to fend off law suits and large awards for being stupid. As we used to say, a law suit is packed with every winch, and there's always a lawyer that takes the case hoping that writing 2 or 3 letters will result in a quick monetary settlement.
Along the same lines, I remember saw Owner's Manuals from the late '70s showing the correct technique for drop starting a chain saw that is now considered a huge safety hazard. When I bought my Partner S55 years ago the dealer took me out to the woodpile and taught me how to drop start the saw. (A lot of saws did not have chain brakes back then as well) So my question to those of you that say a top handle shouldn't be one handed, how many of you honestly never ever drop start any saw, top or rear handle? How many always engage the chain brake prior to starting? These two techniques are extremely dangerous as well, and I confess to doing so on a regular basis.
Stupidity is infinite, just when you think you've reached the top, there's stupid +1. By the same token just when you think the depths of stupidity have been achieved there's stupidity -1. You just have to decide if you want to be +1 or -1.
Take Care