This would fall under what we call a discipline of the Church. Disciplines, unlike doctrines of faith & morals, can be changed.
When it comes to matters of submission, these are often related to discipline. Another example of a discipline that relates to submission, woman braiding their hair and veiling in Church for example was a discipline of the Church.
Both men and women are called to be subservient (obedient) in different ways; and what these ways look like change throughout various customs and ages in History.
It is more about being subservient and not being full of pride, or putting oneself above God and others.
Speaking and conduct is a great responsibility. The Bible warns about causing individuals to stumble and it is a very serious warning:
“Whoever causes one of these little ones who believe in me to stumble, it would be better for him to have a heavy millstone hung around his neck and to be drowned in the depths of the sea.” — Matthew 18:6; see also Luke 17:2 & Mark 9:42
Much like women serving in the Military. Woman are capable of fighting wars, but we don’t really want women dying in wars.
I want to first talk about a related issue that comes up from time to time.
Feminists, who want to change the Church’s teaching on ordaining women (which is not only theologically problematic, it is also driven by pride or perceived justice), will often point out that there were women deaconesses in the Bible (namely Phoebe in Romans 16:1). However, some translations use the term servant. This role was not likely referring to the Office of Deacon as we know it Today.
The verses leading up to 1 Timothy 3:11 speak about the character of deacons and how they ought to conduct themselves, then verse 11 speaks of women and how they “similarly” ought to behave. Some speculate (as I do) that these women could be referring to the Wives of deacons, since the verse following this one talks about deacons being allowed to be Married (only once) and how their children ought to behave.
Or it could be referring to females who serve in the Church, but not as ordained Ministers like the Office of Deacon and Presbyter, but rather in a less formal capacity if that makes sense.
So, were/are women capable of teaching and speaking, sure. Were there female deacons (as we define the Office of the Deaconate today), highly unlikely. If a feminist wants so badly to be a Deacon or, God forbid, a Priest then they are welcome to go join the Lutheran (ELCA), Episcopalian, or “Divided” Methodist Church," but theologically, there cannot be women Priests truly.
Furthermore, the teaching of a male Priesthood is definitive doctrine and cannot be changed.
Oh, and you mentioned girl altar servers. Most Dioceses allow female altar servers, but my personal view is that this should be reserved for boys and young men who are discerning the Priesthood. Every Catholic Priest I have personally asked if they were an altar server growing up, one hundred percent of them answered “yes.” This does not mean that girls are not capable of serving at the Divine Liturgy (Holy Mass), but I believe this discourages Godly young men from serving. We see this in the Military as well. There has been a steady decline in the number of men joining the armed forces in recent years since allowing women and trąns to serve. It could be that the culture as a whole has become both less concerned about matters of Faith and of defending what is good, true & beautiful. Or perhaps it is the scandals in the Church and unjust wars that politicians have been waging. But, that is another topic for another day : )