You are right that we can use the Addresses 1 and 2 only or whichever address we want but my point of view was that most people do not know about this feature.
It is really easy to figure it out. When you are going to sign a transaction, click on "Advanced" and it shows the inputs you spend. If the majority of electrum users are not aware of coin control, then I predict a bad future for bitcoin.
Every wallet have different feature and it is not required that every user should know about each and every factor of the bitcoin wallets.
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.
You can have an iPhone 15, use only its basic features like calling, messaging and Internet surfing, taking pictures and videos without getting into much details of the all the advance features. Does it make the Apple future Dull ? No, it will not.