Generally, baking is not as flexible when it comes to oven temperature as savory dishes are. For example, cooking a hamburger patty at 170°C as opposed to 190°C isn’t going to make a major difference. However, if you applied that same principle to baking a sponge cake, you’d have a problem as the cake would burn on the outside or appear cooked on the exterior but be absolutely raw in the middle. Therefore, it's best to stick to what is outlined in a recipe.