You seem to think there is some inherent advantage in new/fringe/creative ideas, and that's not true.
No that is not true. I never said that. I said that new ideas are a good thing, and no ideas bad. To encourage new ideas we need to encourage people to think for themselves and make mistakes, without fear that they will be punished or ridiculed. It doesn't matter who has these ideas. I would expect that people in academia would have more new ideas, as there are so many "coincidences" and "random" things out there that cry for someone to look at them.
Of course you will not follow every new theory you hear about. You can use your intuition to decide which new theory to give your attention to. That intuition is based on your knowledge and your interest. You will choose to pay attention to theories:
1. Theories that you at least partially understand
2. Theories that are built on the same or similar principles as theories you already believe are true
3. Theories that talk about matter you are personally interested in and want to learn more about.
So you can get interested in a theory based on intuition of feeling.
But you can not reject theory based on intuition or feeling. You can ignore it based on intuition of feeling.
To reject a theory you need to prove that it is wrong.
I know that you keep saying that it is up to who ever proposed the theory to prove that it is right. And that theory can be proven when the theory creator supplied "convincing arguments". But at the same time you are saying that no theory can be proven or disproven. And you say that convincing argument is one that gets accepted.
Accepted by who? Based on what? What about theories that are accepted by half of the scientific community but rejected by the other half? Like two competing theories dealing with the original territory where PIE arose. Or multiple theories about spreading of Indoeuropean languages? How can they all be right or wrong? And what right or wrong means then? Just a consensus? Based on what? Common knowledge and belief of the group that gives consensus? What does this have to do with hard facts and science?
Mainstream ideas are mainstream because people are convinced by them.
How and why when you say this:
Science is about logic and testing, but we never actually know anything.
When do we have enough testing? Who decides this and how?
Black holes are a mainstream idea. No one has proof that they exist.
Higgs boson is a mainstream idea. No definite proof yet.
String theory is a mainstream idea. No proof.
If you ask any leading quantum physicist if he understands the theory he will say no. No one understands it completely, but that does not stop people from building quantum computers.
So where do we go from here? I have proven that in random examples you chose, my sound block theory works. It also works in examples I chose. It is useful. You have not proposed any alternative theory to explain observed phenomena. You are rejecting my theory because it doesn't seem right. You say "I have no reason to accept them because you have failed to support them". And yet as you say, theory can only become accepted, not true. So what you are saying is that your personal opinion is that my theory is wrong, and you base that personal opinion on your feeling and belief.
That is ok. It is your right to do what ever you want, and accept or reject personally what ever you want. But you can not present your personal belief and feeling as scientific truth. And you do, a lot.
This is the problem that you don't seem to be aware of, and which is killing every discussion here. You don't need to accept what I say, you can even publicly say it without having to explain why, But if you keep coming, day after day, repeating the same "I don't like it" argument, then there is something wrong with you. Why are you wasting everyone's time doing this?
Produce counter theory which will help the discussion, and we can all learn something form it.
All questions are scientifically valid. Not all answers are.
Who decides and how which answer is valid? I presume you can test the answer using data? I did. It worked. Now what?