Just think:
Consider an American woman born in 1970. What kind of family was she born in? Considering the facts, Catholic Tradition wasn't very popular back then, so she was probably born in a protestant family, or Novus Ordo Catholic if she was lucky.
How was she formed? Well, right off the bat Homeschooling wasn't popular among Baby Boomers (who did everything according to the American culture template), and the SSPX was pretty tiny and didn't have (any?) schools, so we can assume Public School.
What kind of world did she grow up in? A world filled with errors: relativism, American notion of democracy (authority coming from the people), feminism, materialism, and many others!
That is the soup she swam in for YEARS.
Then in 1992, 1995, or 1998, or 2001, or 2005 (you get the point) she found the SSPX, or the CMRI, or another Trad group and embraced Tradition. Virtually all of us are in this category. Either we converted from the Novus Ordo, or from some other religion. A few of us might be "cradle Trads", but based on my experience, that is rare.
Here's the question for us all to consider: Does this hypothetical woman carry any baggage? What kind of Trad Catholic is she? What ideas CONTRARY TO Traditional Catholicism does she carry inside her? How was she formed?
1. Just how much does her current SSPX (or other Trad group) Mass attendance overwrite her deeply-formed thought patterns, convictions, habits, etc.?
2. What if she were already married when she converted? Will she be able to convert her husband to a new lifestyle, husband/wife power dynamic, and way of thinking as well?
3. What if she had children over 3 when she converted? Will they be able to easily transition into a Trad mindset? What if they too are already in public school, have lots of (non-Trad) friends, etc?
I would suggest: these are very real problems. And I'm assuming a best-case scenario here, where the woman whole-heartedly embraces Tradition and wants to be a good Trad with all her will.
Anyone who has a habit of thinking deeply will be impressed by this consideration. The sheer POWER of formation on an individual. One's family upbringing, their "culture", forms who we are for life. Our environment, our teachers, teach us what questions to ask, and the best way to look at the world. One's friends, parents, teachers, peers, the school one attends, etc. make near-indelible marks on one's character.
These marks are not so easily erased by attending a Tridentine Mass for 1 hour a week.
That is why TV is so dangerous, and why I won't have one.
P.S. This applies equally to men, but I wanted to pick one, rather than make the hypothetical person androgynous :)