No way. 100% disagree. If I didn't have a math major, and just a biology major, I would be scooting away with a 4.0. Every single grade that has hurt my GPA has been in a math class
Biology is facts. If you can conceptualize facts, your golden. There are a limited number of problems they can ask, based on what we know. Math, by definition, Moreover, the opportunity to "mess up" on analytical problems is >> than not being able to memorize biological facts. Bio you tend to stick it or you don't; not so much gray area. Put in a proportional amount of study time, and you will learn a proportional number of bio facts. With a largely analytical subject like mathematics, there is a point of diminishing returns once you can't comprehend the problem. In other words, you can't just guess a fact and get upperlevel math problems right (in complete contrast to bio).
Hats off to a 4.0 math major, no questions asked. It makes a bio major look pansy.