Keep in mind that: Help doesn't equal respect. It is also not equal the opposite of respect.
The Tower of Champions @ L2 can probably only be achieved by a few guilds. There are lots of variables in that "probably." The biggest one is what Inno does, when they decide to cut it off as the reward. They have used the "may" word a lot. Meaning, they may also do something else.
Tourney Grounds can be achieved. Okay, now I am being presumptuous. I do have one in one world. Keep in mind that is a build that will expire. If I couldn't achieve it, it would only be a 2 week loss (okay I'm going with my memory of how long it lasts and I think its 2 weeks).
Of course, having either of these buildings is an advantage. So is anything else you invest in instead. If you accept that you cannot achieve ToC and that 2 weeks of TG isn't worth the bother ... what can you do instead ... I mean ... there are lots of good buildings out there. You use your brain. You pick. Don't let anyone else tell you.
To be fair, I don't have strong opinion on what a medium or small guild should do. I only tell you: Its not worth kissing ... instead, do what is best for you. Don't let them tell you what that is.