@Neil Obstat you wrote: "...and he might go astray sometime in the future."
It is our duty to pray for bishop Williamson, and we need his prayers. Write him and ask him for his prayers. We all need prayers because we can all get lost! We can all make mistakes, but much more worse than that is to get a cruel, or bitter and merciless heart that reject truth and is proud. Let us not forget, it was the pride which transformed a beautiful angel to a demon. This temptation can be found in the tradition. It was also the pride, and a lack of humility and mercy that destroyed the SSPX! These said the Bishop, and he´s right!
[i]So, if you think you are standing firm, be careful that you don’t fall! 13 No temptation[f] has overtaken you except what is common to mankind. And God is faithful; he will not let you be tempted[g] beyond what you can bear. But when you are tempted,[h] he will also provide a way out so that you can endure it.[/i][/i]Corinthians 10:12-13