Is it possible to fix hard bricked device? I'm working in electronic repair store as technician and I started 4-5 years ago but something really bothers me .

Why we can't fix hard bricked devices ? Like device's hardware completely fine . Is there some kind of device for that problem ?

I have 5-10 devices just laying dead because of hard brick because some amateur tried flash a ROM without any experience 

Also I don't know if here is correct place to ask this question , I'm basically trying to flash a android ROM but if it isn't right place for it I can delete my question and please if you're not %100 sure don't write "you can't fix hard bricked devices" , I heard&amp;said that for a long time
In a softbricked device, critical partitions like a recovery partition is usually preserved which helps to easily recover from the condition, but in a hardbricked device all the software interfaces that provide access to the hardware are unavailable, that means there is no method for you to communicate with the hardware. As Robert has rightly said, you need to physically access the hardware in order to flash a software, which in case of integrated hardware is very difficult. To circumvent a hardbrick situation, Snapdragons have an Emergency Download Mode (EDL).