So if the user aren't aware of coin control and no nothing about Consolidating UTXOs, that will have no impact on the use and also this does not suggests a bad future for the bitcoin.
Coin control is not important only for consolidating inputs. UTXO management is very important for privacy reasons too. Essentially coin control is like managing the dollar bills in your wallet. Would you pay for potatoes with a $100 bill? Probably not. What I mean is, it is much better to know how to do coin control rather than not. It doesn't suggest a bad future for the bitcoin, but rather a bad future for the coins' owner.