All the experts mentioned are anti-Bitcoin advocates so you don't expect them to say you should put a higher percentage of your investment in Bitcoin, yeah definitely they will advise new investors to look in the direction of their traditional investments. So as long as you are investing what you can afford to put aside for a long term into Bitcoin, you are good to go through with Bitcoin volatilities because of the long-term perspective of the investor.
They were right to say beginners investors should invest a minimum amount that's affordable to loose which could be spare funds or certain affordable amount of your income because before investors must have got the guts to invest hugely, they must had gained morales towards the volatility market system of bitcoin.
But they've failed to let know that even the traditional market is also risky to pass such message across too that we shouldn't trust the traditional markets too well because they governments could be biased with their exhibitions of the monopoly marketing policies.
Then I accord with you that they tends to inflict indirect fear on bitcoin enthusiasts While embracing the traditional market on a maximum.
Indeed they're anti bitcoineers onto the fact they can't control the decentralized blockchain as the traditional market.