On F1s YouTube coverage the guest commentator, I think he's from nascar or Indy was saying in their races they're not allowed to defend reactively so as to avoid dangerous situations, they're only allowed to preemptively defend
@ 15:11 a guy analyses it, says Alonso took off because he was travelling at takeoff speed of a boeing jetliner
then @ 21:45 they commentate on it and all agree it was fkd up by stroll but also note a lot of drivers are doing it because no ones really coming down on them with a hammer