I saw loads at shows last year that boasted not doing an MOT and frankly they knew nothing about cars and there were a few shady aspects on their motor, not to mention tyres that had extra treadlines between the tread if you get my drift.
It's their choice but I would not want to be in the car with them.
On the other hand I saw others that were well maintained.
Responsibility comes in all shapes and sizes 😊