Because i was there, at the golden age of pc gaming. When exclusives for PC were a thing. At an era, before low quality ports, clunky remasters and oversimplified gameplay was a thing, yet. I was there at the beginning of emulation, the clear edge of PC over all other systems.

Games developed primarily for PC, offer way more complex aspects, from stage design all the way to gameplay elements and mechanisms incorporated. One staple example of that statement, is the thief series. Start at 1 and 2, then observe carefully Deadly Shadows but most importantly, Thi4f. Other game genres, especially Real Time Strategies (like Command and Conquer, Red Alert etc), are best enjoyed on PC, with keyboard and mouse and they perform better there. And emulation is self explanatory, really. Why should i bother with a console, where and when ~5 years later, i can enjoy everything on my trusted PC alone and even, for free? (in the beginning, there were no takedowns, DMCAs, copyrights enforcement etc, all ROMS had been free, especially of MAME, whose programmers were blackmailed into manually breaking compatibility in later versions, themselves and all Sega and Nintendo games were abundant in a plethora of sites almost all over the place).

Better optimization, 60FPS, much more varied and spicy gameplay, better development and in-game details, plus THE, system, for all your needs. What is a console? The source of "consolitis", which threatens even PC gaming, too!

Hardware affordability wise, PC gaming was far superior to consoles when I started buying parts for my PC in 2014. You couldn't play the latest stuff on budget rigs but there were plenty of great options from the last 10 years as well as RTS games, which I couldn't do without.

Since then hardware started becoming less and less cost efficient (I wouldn't have upgraded unless my PC didn't break down) and my country's taxation on it became even more ludicrous. But steam implemented regional pricing, the old games were still great, occasional good new releases from bigger studios and more focused niche releases from smaller studios also started / continued.

Currently, all gaming hardware is prohibitively priced unless you live in a preferred (ie first world) market and the vultures selling the few pieces of it that do reach my country are happy to scalp despite being official distribution partners. Ownership wise, more and more companies are pushing subscription services instead of selling you a game and every game not bleeding NFTs through the nose is considered sub-optimally monetized.

If you have a GPU capable of playing games released up to 2015-ish or can get one for a good price, PC gaming is still worth it IMO. But consoles are scalped less because they can't mine griftcoins and they have decent libraries and some old games to play if you pay for their subscription services. Most of the innovation still happens on the PC platform though and certain genres like RTS still have a very poor showing on consoles combined with the fact that games are more expensive there makes consoles still not very good value, at least in my opinion.

Theoretically, if you can get a used / 2nd hand PS3/X360/PS4 and have all the games you want to play limited to its exclusives, that would be the cheapest deal but even after all these years and even if the used market was actually that abundant, the library would still pale in comparison to PC, though the value will not.

pc games are just better
consoles are usually dumbed down :(