PCmanfm dependents somehow on gvfs but it is not in dependencies

When I uninstalled gvfs* from my Ubuntu 18.4. suddenly I was not able to ssh connect via PCmanfm.
The message was: "The operation is not supported"
Then I installed: sudo apt install gvfs gvfs-bin, the message changed to: "The specified location is not not supported."
Then I installed: sudo apt install gvfs-backends, and it is working again. Ufff.

Can be these programs stated in dependency list.
Or if possible to let PCmanfm work without them. They use permanently to much RAM as daemons... :-(

Thanks

X.

PS:
Ubuntu 18.04.4 LTS
pcmanfm:
  Installiert: 1.2.5-3ubuntu1
  Installationskandidat: 1.2.5-3ubuntu1
  Versionstabelle:
 *** 1.2.5-3ubuntu1 500
        500 http://cz.archive.ubuntu.com/ubuntu bionic/universe amd64 Packages
        100 /var/lib/dpkg/status