No, the party doesn't get to decide that, the voters do. If the DNC could decide that yes it would be a winning strategy, but they can't.

There are essentially three groups of voters roughly representing a third of the US each.

The first group are the conservatives, they primarily want to prevent things from changing further from their rose tinted vision of the past, and if possible undo "recent" changes. They often have an overly simplistic idealized vision of how things were when they were children they want to recreate. This is of course utterly impossible. They are the core of the Republican party and reliably vote Republican because they believe the lies they've been fed their entire life that the Republicans are the only ones holding back Democrats from making the US a communist dictatorship where everyone is required to have a sex change and all the white people will be rounded up and put in concentration camps so illegal immigrants can take their homes and jobs. They are so utterly terrified of this entirely fictional bogeyman that their entire voting decision boils down to "always pick the one with an R next to the name".

The second group are the progressives, they primarily want to improve social and economic issues. These are the core Democrat supporters, but Democrats have always been the least bad option. They know that our first past the post election system means only the two largest parties are truly viable and right now that means the Republicans and Democrats. These are the main group preventing Democrats from winning because as Democrats have consistently shifted right on social and economic policies they've lost more and more of the increasingly disenfranchised voters who look at their options and see literally nobody who represents them.

The third group is basically everybody else. Some of these people are hard core 3rd party supporters like fans of the green party, some are just the entirely apolitical who don't pay any attention at all to politics or current events outside of the occasional flashy headline or overheard water cooler conversation. Yet others are those that don't really fall into either the conservative or progressive camps, neither harboring a rose tinted view of the past, nor particularly caring about social or economic issues. Sometimes these people are very dedicated single issue voters. It's this third group that Trump was able to tap into with his lies and who Harris completely failed to motivate.

Any successful campaign must attract a sizable group from among any combination of these three. Obama for instance won all the progressives and a good chunk of that 3rd group. Trump likewise got all the conservatives and a good chunk of that 3rd group. Harris not only failed to get many of the progressives, but also most of that 3rd group as well.

Republicans have both an advantage and disadvantage in this situation. While each of those groups represents about one third of the nation, conservatives are the smallest of the three by a significant margin. This is offset though by them being very reliable voters (fear is an incredible motivator even when it's entirely imaginary), and progressives being very fickle in their support. This means without taking that 3rd group into account out of the gate Republicans tend to start with a solid lead. Democrats meanwhile need to rally progressives and a chunk of that 3rd group in order to win.