at least in greece, it is not unheard of (it's quite common actualy) to have a used bike judged 'ok' by a mechanic but down the road develop some really weird problems (or complete and catastrophic failure) which are attributed to the bike being mistreated.
a mechanic can't foresee the future nor can he see if the bike has been mistreated and has a higher risk of developing problems due to (say) being worn-in the wrong way... ridden very hard in its early life.
you can't know what has the bike gone through. here's an example. someone buys a bike, squeezes the life out of it, redlining it, whatever, for the first thousand miles or so and sells it. no mechanic can ever tell you what the bike has gone through.
but i actually said 'don't even buy used'. does that sound like 'get a wreck for a first bike' ? no, not at all. which means that you understood something wrong.
ok about those two. are you actually in control of your surroundings too? you can avoid, using your abilities, almost anything. there are things tho you can not control.
consider it... something like a 'soft' version of memento mori.
you will fall off. not my words though (Wayne Rainey has said it, at least i know this). all the other things you said tell me you misinterpreted what i said and stretched them to extremes.
much as you want to avoid it or don't actually want to believe it, it's those four words that keep you 'in line' so to speak. as a fellow rider i honestly and wholeheartedly wish you to never have any even slightly serious injury.