Working conditions aren't the only reason. I would remind you that interpreters were always physically present on the job throughout the pandemic, although some of them may be working remotely now. There are many reasons that have to be considered. Their working conditions are quite intense and the work is fast paced. Interpreters work long hours on site, but I believe they do their work with passion and pride.
Evidence of meeting #117 for Procedure and House Affairs in the 44th Parliament, 1st Session. (The original version is on Parliament’s site, as are the minutes.) The winning word was interpreters.
A recording is available from Parliament.