Related ACX post Declining Sperm Count: Much More Than You Wanted To Know. I will go off of some combination of how sure scientists are that it matters, vs. how big scientists think the effect is.
@connorwilliams97 That's a fair observation. We'll probably focus on the publicly expressed opinions, as we can't truly know what's going on in people's minds
@LordDragon though we should rely more on what they say in journal papers (especially specialized ones rather than generalistic ones such as Nature or Science) than in e.g. press releases or TV interviews, as the former is a little less subject to social desirability bias as the technical jargon kinda protects it from the attention of randomers to some extent
@JeffKaufman I bought some based on guessing yes, but less than I would have if I was sure it was a yes.