Not enough confirmed spendable funds. Address has: 0.0000429 BTC Needed: 0.00016944 BTC (includes gas: 0.00016944 BTC). Some balance shown may be locked in a pending Mempool transaction
Your information is like your Bitcoin transaction was not confirmed. You must know that a Bitcoin transaction is considered as finished only if it has at least 1 confirmation for avoiding double spend scams.
In addition, I don't know what wallet you used but the information about gas is inaccurate.
With Bitcoin blockchain, there is nothing like Gas that is only applied for Ethereum and many altcoin blockchains. With Bitcoin blockchain, fees are paid directly in bitcoin or smallest unit as satoshis, no gas here!
This is just a general thing because if he had any knowledge about Bitcoin he would not have said such a thing.This is absolute necessary work.If it were not done at this time then what he is saying about Bitcoin would never have happen because the work on bitcoin is done very strictly because on the one hand it is very famous and special and beside its price is also high in today era so it is not that easy.
There is no wallet that can buy or sell their Bitcoin in this way so it is either talk about Bitcoin incorrect or it may not have been told about Bitcoin at all.
This is where the need arise and you have done a great job by tell these thing because the more you tell about Bitcoin the more people will be interest in it.