Social media tricks get millions of likes, but a thinking person will always look for a catch.
The situation is similar with drying a steak with a hair dryer.
MIT physicists explain: hot air from a hair dryer evaporates moisture from the surface, creating the illusion of a "crust." But the meat remains raw inside.

"You'll get dehydrated sole," meat expert Jacob Dean says on the Meat Science podcast.
How to do it right
Use paper towels to pat the steak dry before grilling to remove excess moisture.
Chef Gordon Ramsay said in a BBC masterclass: "Dry meat plus a hot pan equals a perfect crust."
Additional details
An experiment by the Sous Vide Everything channel showed that a steak dried with a hair dryer loses 15% of its juices.
When frying in a pan, losses are only 5%.
In real life, cooks and housewives claim that after using a hair dryer, they got “rubber” instead of meat.
Alternative methods
Salt the steak an hour before cooking - the salt will draw out excess moisture.
Use a grill rack to ensure even air circulation.
A little history. In the 18th century, cooks dried meat in the sun. Today, this method is used only in the production of dried delicacies.