Yup agreed with you. Its not like to abuse it till it breaks but while trying it may break..
I have learned by my mistakes and not by abusing it.. I want to make a thing clear that we have serious voltage issues here where I live and you all may be knowing the consequences of the voltage fluctuation.. So my PSU have got faulty due to it.. And I don't know how to change a transformer in its circuit board and it was costing the same as new.. So I opened it.. I don't think wasting a waste thing is bad.. and instead after opening it I could use its inner components.. and that's not for fun and enjoyment..
I think many can spoon feed you about everything but until you see and do it you can't get it actually.. and you can read the mechanism of anything but when you see it actually everything becomes clear.. and I have opened the items only for its mechanism.. and didn't destroy them they can be packed again the same.. except the hard disk.. which wasn't repairable.. and it may be repairable but would you repair a 8 GB hard disk at that cost you can get a pen drive of more storage..
I agree with you that opening things for fun and enjoyment is waste.. but I don't think opening these things are waste and that too for some knowledge..