As weird as it may sound, shooters develop a strong attachment to cartridges. As such, there is often the desire to collect a whole range of them--sometimes by their specialized positioning (varmint, predator, deer-size, big stuff, long-range, etc.), sometimes according to a theme (classic British nitro expresses, European Mauser calibers, Old West buffalo cartridges, wildcats like the OP, etc), sometimes simply as an excuse to buy another rifle.
In my experience as a marketing professional in the gun industry, the whole shooting public can be ultimately reduced to two camps: those who view their gun as a tool, and those for whom the ownership and use of the gun itself is the main source of pleasure.
The first group tends to own fewer guns in fewer calibers, although in that case too there is a curious, often morbid attachment to certain cartridges. For instance, try finding a .44 Special revolver at a decent price, or try talking down the 6.5 Creedmoor to a millennial with a black rifle and a man-bun. For the second group, money, physical space--and a wife's degree of patient resignation--are the only limits; these are the guys whose handloading area looks like an isle in a pre-pandemic Midway USA warehouse.
So, short answer: if you like collecting rifle/cartridge combinations, knock yourself out. Life is short and passions are what make it enjoyable.
