Talk about straining the gnat and swallowing the camel.
Every day, and especially on Sundays, you rub shoulders with fellow Catholics who, despite appearances, are schismatics. They practice birth control, are divorced and remarried outside the Church and go up to recieve Holy Communion, they support abortion in cases of rape and incest, are pro-choice, pro-IVF, pro-euthenasia, etc. etc. There are priests who, despite being “in good standing”, couldn’t care less what the Holy Father says or writes or does. They’ll do what they want, when they want to do it, and no one, especially that man in the Vatican, will tell them what to do!
But, heaven forbid, you should buy something from those SSPX heretics. You might unintentionally imbibe some uncatholic ideas and, before you know it, start acting like a, gasp, traditional Catholic like your grandparents were.