Imo, this is more of hype than substance though you should not be very stupid. I have removed and soldered many smd chips many times( at least 12 to 15 times) and till date have neither damaged track or the chip even after repeated soldering at the same place and same chips. It all depends on your soldering tool, solder quality and soldering skills. IME, my elder brother is an expert in these kind of soldering.ICs being sensetive, and if are decided to be soldered. it would be safe to switch off soldering iron from mains when it reaches maximum temperature.