No - That's the maximum G force that they will experience (in corners the gyroscopic effect on the bike will take over long before they get to 2 lateral G and throw them off at the scenery). The point is, William has somewhat sarcastically stated that F1 drivers do not experience much higher G forces than MotoGP riders do - The fact of the matter is, they do!
Here's a good comparison; F1 cars corner and brake MUCH harder than Moto GP bikes. MotoGP Repsol Honda Team F1 Red Bull Racing 2015 Mark
Bear in mind, the issue isn't the pain, it's the likelihood a broken rib could puncture a lung. None of the injuries you describe riders suffering would lead to further life threatening injuries.
Please accept My sincere apology for misreading the meaning of the following post: Where I live in the UK, the use of "Yeah" rather than "yes" in a sentence such as that, tends to be done in order to purvey a sarcastic response to a comment that has been made. It wasn't until long after I had signed off from Fchat that it dawned on Me that, rather than being sarcastic, you were probably actually simply agreeing with the comment that had been made (especially as a sarcastic response on a forum would normally be finished off with a "rolleyes" icon to emphasis the sarcasm). Unfortunately, a quirk of the internet and forum sites is that it can all too often be too easy to misread something that has been posted. In this case, I am in error and again apologise unreservedly.
I've had fractured ribs, collarbone, an elbow and a concussion due to both a skying and cycling accident. Ofcourse relatively minor in comparison with the G's Alonso suffered. But the human body, any human body, pro-athlete or just a (well trained) amature, switches into a recuperation mode. Pain has zero impact. You loose a significant part of your ability to perform, wether you like it or not, for a number of days/weeks; muscle pain, stamina/endurance all suffer etc. Ask anyone who had a motorcycle accident, it's something you can't control. Your body decides.
MICK DOOHAN: "We realigned the leg and got the length back into it and healed it." "I would have preferred to have parked the motorcycle in the pit lane or in the garage than leave in an ambulance, but, again, that's the way it happened. And, in actual fact, it's probably an easier way to be forced into retirement than to have to make the decision."" Maybe my motorcycle example wasn't very appropriate...... But you probably got the idea.