Hi, have you ever thought this?
You know that, to import a wallet you need the private key or your seed. Taking as example the private key (the 52 letters key). It could exist the possibility someone create a software whose function was to try thousands of times to find the private key till it is be done.This would be like the process to find the new block in mining, anyway you can try the times you want in order to find it.
I think this could be a weakness, correct me if I am wrong.

Or comment if you have a kind of solution for this...
Regards!
Well you must be unlucky if one of the hackers choose your account. Its either youre not being careful with your action or its your really unlucky day that the hacker found out about your account. I think the only solution to this is you must be very careful not to cross with the hackers and add a little more safety to your account