Is a drawn-out war in Ukraine in Europe’s interest?

I apologize for the speculative title but this post got me thinking about this.

Naturally, you'd expect the head of anything to ask for more financing but still. Also, in an interview with PBS NewsHour (clip in this tweet) Zelenskyy said: "They give us weapons so that we are strong enough to contain the Russian onslaught and prevent war in Europe, but not so strong as to destroy Russia and shake the economic profits of our allies."

In my mind, this begs the question: is the continuous depletion of Russian manpower and equipment as well as the financial boost to European defense industries (and possibly other reasons) more beneficial to Europe compared to a speedy (or as speedy as possible) Ukrainian victory?