You can honor where your parents came from without taking the exact road they mapped.

Respect and obedience are not the same thing, though in a lot of families they arrive in the same sentence. Honouring what your parents did means taking it seriously: the sacrifice, the move, the hours. It does not require you to want the career they picked out, because the point of what they built was to give you options they did not have.

Say the respect out loud before you say the disagreement, and mean both. Explain the plan in terms of what they actually want for you, which is usually security and a life that works. Then give it time. This conversation is rarely finished in one evening.