Good idea jack but its more down to inconvenience and laziness.
I have a little over a mile to go before I can access a days worth of driving over farm land, no roads or just crossing the odd rural lane through gates.
It became such a pain in the arse loading the bike on and off for the short journey it was easier to legalise it.
FU was a struggle to get insured with as a new customer. Took some badgering.