I've ever only found grease/anti seize on tikka threads. By contrast, Remington's often have a mild thread locking compound.
The issue isn't that tikka barrels are overly tight, its that run of the mill barrel vices are "one size fits all" and they suck. The fact that many people (and companies) make a relief cut to remove a Tikka barrel is a travesty in my opinion, as their factory barrels are very good and are in high demand.
A proper barrel vice and action wrench makes removing a factory Tikka barrel a 30 second joke. I do it very regularly; both for builds I've been commissioned to do and for customers who just need the barrel cracked loose and will take the project from there.
I also sell the tooling to guys (and shops) who plan on doing multiple projects.
More info can be found on my website here:
https://www.prprecisionrifles.com/products-1/p/barrel-vice-15
And here:
https://www.prprecisionrifles.com/products-1/p/external-action-wrenches