As someone new to this, but intending to gain the approval to operate commercially in the UK, I've been looking through forums and elsewhere to learn from other people's experience, and also seeing how legislation applies to SUA Ops.
As ever with forums you find threads where people get bogged down with concerns that, in the big scheme of things, are not too important, and perhaps the issue of DJI No Fly Zones is one of them. Having looked at the list, and map, on DJI's website it looks perfectly reasonable, and well thought out to me. It appears that some consideration of aircraft performance certification might have gone into designing the NFZ's, but neither the list nor the map appears to indicate where the circles are centred. Presumably this would be on the aerodrome reference point, but the map centres the circle wherever the map says the airfield is, hence I'd have thought the map cannot be used to determine where you might fly in the vicinity of an airfield. You'd need an aviation chart. Regardless of the exact centre position the area outside the inner circle may still fall within an ATZ, and whether commercial or not CAP722, section 5, chapter 1, para 1.37 is good advice.
Apart from the position of the circles, the choice of airports is also curious. Many parts of the world have none. In the UK a number of civil airports with significant commercial jet traffic are not included, nor is Battersea Heliport. Several US states have none, while, for instance, DFW has one but Love Field doesn't. In the same part of the world there are none in Oklahoma City, nor Little Rock. In France Annecy is a category B, having infrequent turboprop flights to Paris, along with business jet traffic displaced from the now quite busy Chambery which doesn't have a NFZ, but does have plenty of commercial jet traffic, especially in the winter, and which depending on the wind can be required to circle to land at low level.
I used to own an old biplane in the UK, but I couldn't just go anywhere I wanted. Neverthless I was able to operate freely, non-radio, over much of the country. There will always be restrictions. At the moment SUA ops are remarkably unregulated, and attention might be better directed at watching what the likes of EASA and ICAO are up to to keep it that way. Incidentally I operated my aircraft from a private grass strip on a farm. There are a lot of those, usually unmarked on maps or charts, but often visible on Google Earth.