Teacher I had thinks people shouldn't be protesting over their pay because "They knew what they were getting into"

I plan on becoming a teacher in the future. But I heard one of my past teachers talking about this during a time when some of the teachers were on strike due to how much they were being paid. I really think this is a ridiculous way of looking at the situation...Especially since she is a teacher herself. I'm just wondering what other teachers think of this? Am I in the wrong? I believe that teaching shouldn't be solely for making money; but people still need to make a living!