Airdrops and bounties are great if you are only a beginner, this is just an opportunity to earn even a small amount of money to start for investing or trading, all free is worth it especially if you are guaranteed of receiving it. There are some airdrops that are good one of the highest airdrop I received is worth $100 from Yobit, which I used for investment.
Bounties are not only for beginner bro, i mean we are do some task and earn a worth reward for do it, just be picky when you do kind of bounties.
I think you misunderstood him, he want to said if you only a beginner, airdrop and bounties are great, its not hard to do and didnt required high skill to earn from it.