If the 'other investing approach' is a broad market index like the S&P 500, where is the 'appearance if insider trading'?
GP's point is that they could be almost entirely in the S&P500, with some minor innocuous deviation (tracking error, frankly!) and it would look the same. So this isn't really suspicious at all.
Sure it's a US-focussed index, but isn't that you want from your politicians? (Outsider perspective here fwiw.) It'd be worse if they were some foreign country's politicians where the markets at home had done poorly and they'd basically tracked much better performing US index.
GP's point is that they could be almost entirely in the S&P500, with some minor innocuous deviation (tracking error, frankly!) and it would look the same. So this isn't really suspicious at all.
Sure it's a US-focussed index, but isn't that you want from your politicians? (Outsider perspective here fwiw.) It'd be worse if they were some foreign country's politicians where the markets at home had done poorly and they'd basically tracked much better performing US index.