At 100 km/h (low-end highway spreed), or 1,666 m/minute, or 27.7 m per second, a 2 second gap leaves approximately 56.6 m (185.6 feet) between cars. With the average car length being ~4.9 m (~16 feet), even the absolute worst driver can merge in a space ten times the size of the average car, assuming they’re matching highway speed.
Most people have no actual concept of how long 2 seconds actually is or how much space it would leave in reality.
People will probably study this phenomenon for a long time to come, but people become wildly fanatical when a person in power shares their bigoted views and people in power can’t seem to resist turning it up to 11 because those types of fans make you feel like an absolute god.
Maybe from her POV being famous for writing the books became mundane, but all these people suddenly treating her like she’s a sociopolitical genius probably hits that reward button so well she just can’t stop taking another hit.