I can't speak for the intepretation of the bible alone, but in general if we look at all religious texts, each person who study and following/practice the teaching will have a certain level of understanding or wisdom of what the teaching means.
But no human are at the same exact level, so you will always find variations when people speak of the "true meaning" of spiritual teaching.
Each person just don't understand it exactly the same, and by that cant give just one answer to a question.
An other thing is :how was the question asked? There are variations in how to ask the same question too.
Many factors to take in to the answer.
Picture the whole truth as a 3-D ball. We can approximate this ball of truth with an infinite number of 2-D circles, each with a common center but all at different angles. Each 2-D circles represents a part of the truth, while the sum of all circles approximates the whole 3-D truth.
For example, I might say that Joe is a father. This can be true, but it does not fully characterize the full truth that is Joe. Joe is the center of a 3-D ball of truth. Joe is also a son to his parents and a husband to his wife. These are two of the other circles needed to express the entire 3-D truth. Truth begins small; a few circles, with new aspects of truth; more circles, appearing over time, until one day the full 3-D truth appears. The Holy Spirit helps one fill in the circles with data.
Some things can be true; 2-D circles, without being the whole truth. The propaganda machines of political parties often try to represent a single circle of truth, as the whole truth. A political enemy might say something that is not PC, and be attacked because of this truth. This can be a career ender. But the entire 3-D truth of that person may be mostly a testament to long life full of community service; 3-D truth. If you cannot tell the difference between partial and full truth you will vulnerable to the pull of the propaganda machine. The 3-D truth always trumps the 2-D truth.
When different people and different generations interpret the bible, each is adding 2-D circles to the ball of truth, so that one day the full 3-D truth can be known. Sometime this causes debate and arguments, but that is due to the full truth often having conflicting 2-D circles of truth during different periods of life. But both can be true in the context of the full truth; plotting plus and minus circles on a graph. Nobody is perfect so some 2-D truth may not be flattering. But it is part of a full life and what makes us all human.