Why not?
1. it's inefficient
2. harms the battery – part of that inefficiency is due to the receiving aerial in the phone getting hot – which heats the battery – which shortens its life
3. positioning is critical – differences of less than a centimetre (0.4 inch) can substantially reduce the charging current
4. slower
5. more expensive
http://www.howtogeek.com/233205/why-you-dont-want-to-wirelessly-charge-your-smartphone/ / wireless charging overrated current form dream wireless power sounds great current wireless charging technologies plugless wireless less convenient slower less-efficient less efficient just plugging phone in wireless chargers more interesting proof of concept future technologies practical charge your smartphone plug it in cable wireless chargers even more constrained charging cables use wireless charger place your smartphone down charging mat mat plugged in wire sits on table smartphone charging mat wirelessly transmit power phone smartphone mat wireless charging stop wireless technologies wireless Internet freedom move around charging cable better cable smartphone is very short very near a power outlet much longer third-party charging cables Lightning cables iPhones standard USB cables Android phones plug your smartphone into longer cable use while charging smart phone wireless charger smartphone bedside table charging mat use longer cable charging smartphone desk longer cable cheaper buying wireless charger device less convenient smartphone wireless charger a bit finicky lines up starts charging plugging it in wireless chargers charging pad outlet phone charging pad contactless wireless wireless charger takes longer uses more power generates more heat faster more efficient transmit energy over wire wired charging much faster charging overnight quickly top-up your phone wired connection wireless less efficient take more electricity charge phone wirelessly wasted power excess heat destroy your phone heat enemy smartphone’s battery wireless charging extra power electric bill extra heat accelerate battery’s decay downsides less convenient flexible simply plugging your phone in even less efficient even slower more wasteful electricity /
