So is this a problem or not?
"Despite Democrats’ Georgia wins, the GOP’s structural advantage in the Senate is only growing, given its dominance in small rural states. The level of inequality in the Senate today would have shocked the likes of James Madison. In 1790, the country’s most populous state, Virginia, had 12 times as many people as its least populous, Delaware. Today, California has 68 times the population of Wyoming. Fifteen small states with 38 million people combined routinely elect 30 GOP senators; California, with 40 million residents, is represented by two Democrats. This imbalance is getting worse: By 2040, roughly 70 percent of Americans will live in 15 states with 30 senators, while the other 30 percent, who are whiter, older, and more rural than the country as a whole, will elect 70 senators."
You can either say yes or no. If you say yes, then you should believe in senate reform to make it more proportional to population. However, like other Republicans, I'm guessing you would say no. If that's the case, then you have no real principled argument against DC and PR statehood. You have a political argument, but not one based on principle.
If Dems are dealing with purely political actors who refuse to act on principles, then Dems need to play by those rules and "even up the playing field" by bringing in DC and PR.
If structural features of the senate favor Republicans--and Republicans refuse to alter those structural features--Dems should be able to use those same structural features to obtain a more democratic result.