and so of course LibreOffice should make its style-using users suffer.
No. If there were an option in the preferences, i.e. “Use MSO Tabs Behavior,” or “Use LO Styles Only,” which is not enbled by default, it would not make anyone “suffer,” as you insist, unless they explicitly choose it is what they prefer, seek out the option, & enable it.
Not everyone on the planet thinks the same. You have decided that LO’s approach, whereby TAB cannot be used as in all other software, is better. That’s great, more power to you. You have a better approach. But to continue to insist that every other software in the world is wrong and therefore everyone must learn your way of doing it honestly just comes off as arrogant. Your way may well be better. I’m not arguing that, which is what you guys seem not to get. But since every other software doesn’t do it that way, there may still be of millions of people who simply prefer consistency of behavior over your “better way” of doing it.