You have more power if you need it;
The problem is begineers don't know when to twist it and when to back off, or they wouldn't be beginners now, would they ?
That is
very dated logic, because it means that it's really okay for inexperienced street bike riders to ride 200 mph superbikes. It isn't. It isn't whether they're going to practice self-restraint or not.
There's no simple right/wrong with why they shouldn't. What it is is first it takes time ,correct instruction and experience to know how much,how fast and when to do what , and second the bike has to be an appropriate one so they don't pull the trigger when it's pointed at a tree or a drop off and the engine happens to be in the meat of the powerband.
It's just like so many hobbies,aviation especially. The most dangerous (by accident rate)aircraft type? Not trainers.
It's the the pilots first experiences with a light twin. Even with great initial instruction most accidents do
not happen early on.
They happen when the new person starts to think they've "got it", when in fact what they've got is overconfidence and a smack down on the way.
It's all a personal decision . However, if you're the one someone is trusting to make the decision for them, look at it really hard,and really honestly.
Not the decision that actually gets
us another toy

, but the right one for the new riders safety and well being. Doug