Have joined hundreds of airdrops and have learned something which I would like to share with you as many seems to waste their time on shityy airdrops which tbf aren't even worthy of being called airdrops.
Significant value airdrops did not ask for much info or tasks.
These projects stayed true to what 'airdrop' really is. Only asked for the address so they can send you token, tho sometimes there were requirements to prevent sybil entries.
No follow to tens of social links and other social media bs, didn't attach $ value, no sign up, no lucky winners, no referral shite, and oh, no KYC.
You are right that a "real" airdrop should never require you to do a follow on twitter, retweet the pinned tweet, join the telegram channel and to do other social media stuff, because that is not the definition of an airdrop, at least not for me. The sad truth is though that airdrop like you describe them are not happening anymore in todays cryptoworld, because almost every so called airdrop requires some social media activity for you to be eligible. The dfinity airdrop back in 2017 or 2018 was a real airdrop in my opinion because you had not to do any social media stuff, but then on the other hand you had to make a KYC to be eligible.