Gorsuch could rule as he did, since he was only interpreting a Federal Law. The religious landmine, is a Constitutional Amendment, embedded in the First Amendment, which begins "Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof:".
That does leave churches and religious organizations potentially outside of his present ruling. He also mentioned that issues such as bathrooms, locker rooms, and athletics were also not addressed in the ruling.
At its best, we are dealing with small, perhaps minor areas, the great bulk of all employment is now free of discrimination, unless they want to endure a discrimination lawsuit. That is a major improvement.
Textualism ignores the "living Constitution" for the Social Contract. Meaning the accepted Social Contract that was formed when the Constitution or any of its Amendments were approved. This keeps the times of those enactments as the present frame of reference for how to interpret them.
Then again, without interpretation where are lawyers to go.