Guardian only Tank in Endgame?

Hey I just started with lotro and really like the 2h sword Guardian red line gameplay. I often hear that a guardian is only a tank in later and higher endgame. I am a good tank in WoW but I am scared of lotro tanking because I dont know any raids or dungeons. Im thinkin of rerolling but there is no real alternative with 2h swords.

What do you think?