You obviously have never played a support and tried to attack a zzrot portal. First off it is an item with decent stats, and a damn good re-castable active. If someone kills yours you put it in a bad spot or didn't defend it properly. It still isn't like you lost 2k though as you can just recast it again once the timer is up and you still have the stats on the item.
10 hits would be ridiculous for anyone that doesn't have attack speed, even with its current state it still takes the person finding where it is hidden, and then spending 4-5 secs killing it while exposed. Even if you were to lower the hps it had before it still would be stupid the amount it takes for a tank or support to kill it solo since spells don't hit it either.