“Obviously, there are those who strongly hold that it is irrelevant that today, ”
No there absolutely are NOT. Unless you are talking about the Reform/Conservatives.
There is a heter to eat chalav stam. Or, if you prefer, you could say there’s a chumrah to eat chalav Yisroel (albeit this wording would be inaccurate). Either way, NOBODY says the issue is irrelevant. Keeping chalav Yisroel is halachically preferable according to all, including those who permit chalav stam.
Your language further down is suggesting that you could drink goyishe milk in any country because in your mind the halachah was flawed from the start. I’m sorry, but your knowledge of this is clearly very poor and you should do some research before brazenly making light of something straight from the Mishnah.