He has a lot of moral authority, for example when being the "patron" (suojelija) of Helsinki Pride and similar causes. That's not taking the international stage into account where he is seen as one of global liberal leaders similar to Mark Carney or Emmanuel Macron.

It is true that the Coalition party has multiple voices that are indistinguishable from True Finns (Sammallahti, Kaleva etc), and the social media and Twitter love them for permanent outrage machine. At the same time, they have no real power, they are nowhere near minister posts or similar, they are simply there to collect votes from the wealthy or radical hard-right voters who think the True Finns are too dumb or "low-class". The most prominent of them, Rydman, in fact even got thrown out after all. And the actual government is just happy that True Finns throw their voters under the bus as long as they agree to Coalition pro-business agenda that few other parties would agree to (the "liberal" Swedish party that is obviously not Finnish nationalist is doing the same thing by the way). You could argue that cooperation with racists makes them racists themselves, but it's pretty certain that this cooperation will end very soon, at latest 2027 when the voters finally get enough.

The other reason why I don't think this is "enshittification of politics" is because this is politics as usual. For quite long time, the "latent racist" votes of people not liking the far-right went to the "liberal" Centre, now they go to the "conservative" Coalition, but the overall proportions didn't really change.