[tomohawk]

A key difference between Turkey and Finland is that Turkey has the largest army in Europe and can unilaterally take action.

Finland can only take action if backed by many other NATO members, and most especially by the US.

Dealing with this as a policing activity tells you all you need to know about the current leadership of the US and other NATO countries.

[jopsen]

Finland has a sizable amount of hardware in storage.

And could easily donate more equipment to Ukraine.

Even if stockpiles runs low, Finland could finance equipment for Ukraine.

Both of these options would hurt Russia more, and probably cost less than direct intervention.