It's all about your threat model. The lock on your front door doesn't prevent someone with the right tools from getting in either, but it still provides meaning

It's all about your threat model. The lock on your front door doesn't prevent someone with the right tools from getting in either, but it still provides meaningful security against large groups of potential attackers. FWIW, Windows Hello does try to defend against this attack by requiring special cameras that operate in the infrared band.