Panta means "all" or "all things" you claimed it had the meaning of "all life."
Strictly speaking, "things" in "all things" is contextually redundant, in that all and everything are synonymous, and the Koine Greek "panta" conveys this sense (hence, for example, pantheism, which means "everything is God").
That's not proof, it's an unsubstantiated opinion based on what amounts to higher criticism. Without manuscript evidence, higher criticism can be used to make any desired claim about the NT, which is why we have books asserting the entire Gospel of John is a forgery, and endless debates over the authenticity of various epistles and so on, which are purely subjective and based on opinion.
Proof, actual proof, requires solid evidence, and not a subjective opinion about what a text should say, based on how I feel or how you feel about consistency. It is known that there are verses in the Bible that to the layman seem to contradict other verses.
I think that by "7 other verses" you want to include the Longer Ending of Mark, which unlike Matthew 28:19, is of dubious authenticity.
1 John 5:7-9 is not well attested in terms of manuscript evidence, but that does mot mean it is necessarily a forgery, any more than Mark 16:9-20 or the Woman Caught in Adultery pericope in John are necessarily forgeries.
You yourself are insisting that an important verse is not Scripture, because you disagree with its implications relative to liturgical practice. Your argument contradicts Matthew 28:19, it contradicts John 1:3, and you want to delete the former and rewrite the latter in order to support your doctrinal position.