why my laptop can't use wireless charging technology?
You can use wireless charging techniques for charging laptop computers but you won't be very happy with the current state of the technology.

The wireless charging systems that I've worked with for smartphones are good for maybe 10 Watts (but often less). That's okay for a smartphone and most will reach full charge in a few hours. 

The smallest laptop charger for a medium-sized laptop is at 60 Watts. Higher-end laptops can have chargers rated at 135 Watts or more.

Many (most?) laptops need 20 to 50 Watts just to operate. Your little 10 Watt wireless charger can't even keep up with required power to operate the laptop, let alone have enough energy for charging the battery.