'Dynamic Queue isn't an indicator of Skill'
Clearly the point is that the type of skill Riot wants to measure and encourage is communication, teamwork, and working with a group of people who may themselves be a premade while you are solo.
I get that it might not be the type of 'skill' you value if all you considered a rank to be is a Flashy Solo Plays Rating, but hey guess what - plenty of people are perfectly happy with the idea of teamwork being a significant part of the measurement of skill as it pertains to league of legends.
If you still want to play solo thats fine, but the new system will take into consideration your ability to play with and against premades when it calculates your skill rating from now on.
That's not 'losing the integrity of ranked', that's just another meta shift like all others before. And like all other meta shifts, you must adapt or fall in the standings. If every person who can't live without soloq leaves league, the remaining players will still be plenty happy to have dynamic queue and new players who join will have no problem with it either because it will have always been that way for them.