You do not have to be anti-vaccine to be pro-Ivermectin. They both are effective, one is cheaper, has been available for years before in other use cases and avoids the concerns of many people.
Nothing is cheaper than a vaccine. Nothing comes close. The vaccines cost less than $20 per treatment (1 or 2 doses). There is no way a full treatment of ivermectin would be that cheap. Two reasons:
1. The direct cost of the pills must be higher. Assuming ivermectin works both to prevent or cure the disease, I am sure you have to take many pills over the course of treatment. That has to be more than $20.
2. There are indirect costs such as lost work days from getting sick, even with a mild case. These costs will be much higher with ivermectin, because it does not prevent or reduce the symptoms as well as the vaccine.
Ivermectin is said to prevent the disease, but no one claims it does a near-perfect job the way the vaccines do. If you get the disease, ivermectin is said to reduce the symptoms. However, it does not reduce them as much as the vaccines do in a breakthrough case. The vaccines make it very unlikely you will need any treatment at all. So, to evaluate the cost, you have to include the cost of getting the disease even though you took ivermectin, versus the cost of getting the disease even though you were vaccinated. The former will be much more common and therefore much more expensive. There will be the cost of treatment, and lost work days, and family members dealing with your disease. This will surely cost hundreds of dollars per patient, maybe thousands. So, a one-for-one comparison will show that ivermectin or any medicine that fights the symptoms rather than preventing the disease altogether is far more expensive.
Along the same lines, many drugs reduce the severity of influenza. They will reduce suffering and perhaps even help you avoid pneumonia, saving your life. But if you get influenza, you will suffer, and you will lose a week of work. It will cost you a lot of money. There are even antivirals that reportedly kill off the virus altogether, but you still get sick for several days. Whereas an influenza vaccine usually eliminates the disease completely. You are not infected. You get no symptoms at all. You lose no time at work. You lose no sleep. Influenza vaccines are less effective than COVID vaccines, with more breakthrough cases, but the breakthrough cases are often so mild you don't even realize you are sick. (That happened to me one year.)