I have to conclude that you cannot understand the words on the page.
1 Cor 14:
2) For he that speaketh in an unknown tongue speaketh not unto men, but unto God: for no man understandeth him; howbeit in the spirit he speaketh mysteries.
14) For if I pray in an unknown tongue, my spirit prayeth, but my understanding is unfruitful.
18) I thank my God, I speak with tongues more than ye all:
Cherry picking verses because you already have false conclusion.
The summary of the whole chapter is- don't speak things that are not understandable to yourself or other people, unless an understanding is sought for, shut up.
1 Cor 14:
5I would like every one of you to speak in tongues,
b but I would rather have you prophesy. The one who prophesies is greater than the one who speaks in tongues,
c unless someone interprets, so that the church may be edified.
......
6Now, brothers and sisters, if I come to you and speak in tongues, what good will I be to you, unless I bring you some revelation or knowledge or prophecy or word of instruction?
7Even in the case of lifeless things that make sounds, such as the pipe or harp, how will anyone know what tune is being played unless there is a distinction in the notes?
8Again, if the trumpet does not sound a clear call, who will get ready for battle?
9So it is with you.
Unless you speak intelligible words with your tongue, how will anyone know what you are saying? You will just be speaking into the air.
Here Paul clearly says the tongue can not be meaningless. But you are insisting on meaninglessness.
10 Undoubtedly there are all sorts of languages in the world, yet none of them is without meaning.
11If then I do not grasp the meaning of what someone is saying, I am a foreigner to the speaker, and the speaker is a foreigner to me.
.....
15So what shall I do? I will pray with my spirit, but I will also pray with my understanding; I will sing with my spirit, but I will also sing with my understanding.
16Otherwise when you are praising God in the Spirit, how can someone else, who is now put in the position of an inquirer,
d say “Amen” to your thanksgiving, since they do not know what you are saying?
.....
18I thank God that I speak in tongues more than all of you.
19But in the church I would rather speak five intelligible words to instruct others than ten thousand words in a tongue.
20Brothers and sisters, stop thinking like children. In regard to evil be infants, but in your thinking be adults.
21In the Law it is written:
“With other tongues
and through the lips of foreigners
I will speak to this people,
but even then they will not listen to me,
22Tongues, then, are a sign, not for believers but for unbelievers; prophecy, however, is not for unbelievers but for believers.
23So if the whole church comes together and everyone speaks in tongues, and inquirers or unbelievers come in, will they not say that you are out of your mind?
24But if an unbeliever or an inquirer comes in while everyone is prophesying, they are convicted of sin and are brought under judgment by all,
25as the secrets of their hearts are laid bare. So they will fall down and worship God, exclaiming, “God is really among you!”
This is very clear, it was even prophesied (v21). Do not speak meaningless words whether for yourself or for the congregation.