Mining is a resource hungry process and it will peak your processors all the time and that will affect the system on the long run and can damage your system,
Can you cite any credible source for that claim? It is just plain wrong to say that mining will damage your system.
i can bet that the processor wont last one year if you are trying to mine using your laptop,
I would be very happy to take that bet.
you must take that into consideration when you are planning to mine and the amount of money you spend for electricity before calculating your overall profit.
No, you should not take into account the incorrect assumption that you could in any way shorten the life of your equipment because it will not happen.
I already said that electricity costs have to be part of the profitability calculation. Along with the hashrate of the processor, network difficulty, and exchange rate, electricity cost always has been and always will be part of the equation for any mining activity.