I've known painters that have washed the walls with all kinds of treatments, filled them with a quality filler, and the spider cracks return. It's the houses in the old and historic neighborhoods that are the most notorious. Plaster walls only. If there is weakness underneath, then even the larger cracks can return. Age may be a factor too if you hadn't had problems before.
You can use the liner paper only on the problem areas. I don't always cover all the walls with it. Then I float the edges of the paper to blend in.
If you have to smooth the walls anyway, it's not a time consuming process really.
Also, I mostly do this for clients that know they have a recurring problem. If it's speculation then I can't say for certain you would have a similar problem.
The key also is the Vinyl over Vinyl product added to the prepaste. Plaster is not friendly to normal wallpaper paste. VOV will stick to glass or non-porous surfaces. It will stick to vinyl wallpapers too. People wonder why border doesn't stick sometimes.
I use Roman's