This is very much an opinion, not a fact. "Intel is only in trouble because they got caught, AMD is surely incompetent as well, but hasn't been found out".
My point is that there is more academic research on Intel processors than AMD. For a hacker, an Intel vulrability would of course be more lucrative than a AMD one.
That's a good point, about half the results go away when you add "processor" to the query. Interestingly, the same happens for the AMD query so the ratio is still similar.
That number is literally the most meaningful number there. Meltdown caused more scare than all of these 400 bugs described here, just because intel is not expected to have any sort of vulnerability and the people who really care about security chooses intel(not talking about self described privacy pundits on HN, but military and banks). There had been much more research on intel security than all other chips combined.
I dont think it has much to do with competence, the order of complexity in these chips are reaching super human levels of intellect to decipher. Finding vulnerabilities is hard but safeguarding against them is even harder. Take 'spectre' for instance, it is a fundamental problem with the speculative architecture can't really get rid of it.