My point is clear, and you've made it for me - you clearly deem yourself to be competent to carry out tasks which you hold no formal qualifications in, that's fair enough.
Your point isn't very clear at all and I haven't made it for you read the post again I got my experience working on vehicles under the supervision for many years of a qualified old school mechanic learning a lot of things they don't teach the vehicle technicians of today. There are a lot of electricians out there who started as mates and got made up to sparks with little or no theory or qualification behind them
Nigel Gresham also considered himself competent - I expect there have been lots of damage, injury and deaths due to folks assuming their own competence - the premise of the petition is flawed and simply not enforceable.
To use one of your favourites go away and do a bit more deeper research
This guy was an idiot and a bit deluded to use that as a defence, he had extensively "modified" that vehicle with many incompatible parts to the extent that it was probably easier to list what was right with it if there was anything than what was wrong with it, I read most of the reports on that incident at the time and what he had done was create a travelling incident waiting to happen