I do all three:
Campsites, wildcamping, and stealth camping.
There are wildcampers who don't like stealth campers, and campsite aficionados who don't like either of the other two.
I'd say horses for courses. Do what suits your schedule and your pocket. To be honest, site camping even on CLs can mean quite a lot of planning ahead as the sites get booked, even if people don't show. I'm very much a spur of the moment person. I don't like booking ahead, espec many months in advance.
On forums such as outandaboutlive (is that the MMM associated forum?) my opinion is that the management and the readership tends to go hand in glove with the official converters and site providers. Most of these magazine or website ventures are partly funded by advertising and the traders who provide stuff "free" for review even whole motorhomes for 6 months, so they can hardly be impartial.
The theme of them tends to be buy this, buy that, insure this, insure that, health and saftey, can't be too careful, spend some money..... so home conversions and wild camping are rather alien to their cause despite the odd mention or olive branch they may offer in that direction.