To some extent, yes. But if they choose React Native, something's probably wrong, because (despite what the article says) that requires throwing in a Javascript engine, significantly bloating a core Windows component. If they only use it for a small section ("that can be disabled", or in other words is on by default), it seems like an even poorer trade-off, as most users suffer the pain but the devs are making minimal advantage of whatever benefits it provides.

If the developers are correct that this is the best choice, that reflects poorly on the quality of Microsoft's core native development platforms, as madeofpalk said.

If the developers of a core Windows component are incorrect about the best choice, that reflects poorly on this team, and I might be inclined to say no, someone more senior should be making the choice.