everyone is also allowed to put forward their own ideas as long as the ideas are good enough and do not oppose other people's ideas,
I don't see anything wrong with opposing the ideas of other members, and those who oppose ideas of other members while giving reasons (and perhaps even evidence) for why they oppose the ideas will provide fruit for deeper discussions. Sure there are some members who seem to just oppose for the sake of opposing, so that can be a bit annoying if some members are not really explaining why they are for or against some ideas...and yeah, sometimes it can be a bit unclear regarding how much evidence and/or explanation is needed when opposing the ideas of another member, so each of us has to make those kinds of choices regarding how much we believe we need to back up our own ideas -especially if we consider them to be going against what other members might be saying...
and sometimes we get the facts and/or the logic wrong too.. so sometimes we might believe that we are saying different things from other members, but we just end up saying similar things in different ways... so the ways of communicating can continue to be confusing for some of us from time to time, too.
And we need to do that since how those people could able to learn if we didn't oppose on their wrong statement posted. So for them to learn their mistake we should voice out our concern then provide solid proof pointing out that they are wrong so for sure with that they can learn something then correct everything to make a better decision especially for their investments.
We can clearly identify those people clearly opposing without posting any proof to strengthen up their arguments then I guess no substantial new ideas we can get from their corrections or criticism.
That's why also we need to properly communicate to people so that we could able to correct their misunderstandings and explain if we have same point so that there will be no confusion on both side then the discussions will be more focus on strategy that they want to build when everything understand each other.