He said they tried starting a family in 2020........so they indeed probably tried things the old fashioned way for 1+ years before seeking medical help. I'm pretty certain Robert Mathis of the Colts got suspended for Clomid at one point while he was also working through fertility treatments with his wife to try and have a 3rd child (they had their twins after fertility treatments previously). As an off-brand prescription, Clomid is typically taken by men who may have issues with injuries to the berries - not exactly a rarity among catchers, most likely.
Severino screwed up by not knowing what he was taking could impact his ability to play baseball at the start of this year due to failing a drug test. Any time a professional athlete finds themselves taking a drug whose intent is to alter hormonal responses, they need to be be extremely careful understanding whether it's a substance that could trigger a suspension from a PED test. I'm not defending Severino or offering up excuses justifying his decision to take Clomid as part of this fertility treatment - he's out half the season because of it and that sucks for both the Brewers and more importantly him.
That all being said, you are way off base instantly jumping to say he took this strictly for on field performance issues. There are many other drugs that players would opt to take first before Clomid to get that effect, which is typically used as a masking agent in conjunction with steroid use or to try and trigger the body to start producing testosterone if someone has previously been on roids and their body can no longer produce it naturally. This is Severino's 1st positive test in over 10 years of professional baseball and many prior drug tests, so I'm going to give the guy the benefit of the doubt at this point even if I don't think his decision was the right one to take it.