For a professional, that's a few days of work. Over 5 years, after tax etc etc, it's still a blip for what is effectively one's main tool.
An IT pro must invest in three primary tools: chair, monitor, and laptop. A £5K budget to amortize over 5 years is fair game, and in the grand scheme of things (traders etc) is actually very very low.
If it's to watch movies and play games, then of course it's insanely pricey; but then you don't really need 32GB, nor a MBP in the first place.