Basically when it was invented leap seconds seemed like a good idea because we assumed the inconvenience versus value was a good trade, but in practice we've discovered the value is negligible and the inconvenience more than we expected, so, bye bye leap seconds.
The body responsible has formal treaty promises to make UTC track the Earth's spin and replacing those treaties is a huge pain, so, the "hack" proposed is to imagine into existence a leap minute or even a leap hour that could correct for the spin, and then in practice those will never be used either because it's even less convenient than a leap second - but by the time they're asked to set a date for these hypothetical changes likely the signatory countries won't exist and their successors can just sign a revised treaty, countries only tend to last a few hundred years, look at the poor US which is preparing 250th anniversary celebrations while also approaching civil war.