Because cons have had global upgrades since launch and have sucked the entirety of it. Only what last year they even got atheir price looked at. The patch cycle isn't reliable enough to test out something that will 100% be left broke for months then maybe half fixed (JLI for example) if cons require constant investment throughout the game they would need to be cheaper than ostroppen to start. It's already hard to justify 205mp and 35 fuel into the average priced but subpar performing squad without adding more investment to make them slightly less shitty. At what point would be the proper investment to have cons start to function to their purchase price? Do we need another 200mp and 30 fuel? More?
Bruh, just make it free or package it as part of the Tier-4 upgrade. No more side-tech, you unlock ze bonus if you go tier-4. Cons get better guns/RA/whatever. I don't think anyone is gonna complain that making a fresh conscript squad 30 minutes into the game is "OP" (actually, I can think of a few -- but they would complain about literally anything so eh).
Globals only work if it's something you intend to have a lot of. For cons the plan is to have as few as possible because you are trying to win.
There's some circularity in the logic here, but if the unit was worth using -- it'd be used. That's how JLI and valentine went form "never used" to "always spammed". The unit was made worth using. If making cons becomes a promising prospect of decent infantry that can scale well and with the added bonus that their late-game performance isn't tied to veterancy 2 + getting luck to pick up a dropped gun, then it'll be more worth it to make.
Also, yes I like winning, but I also enjoy playing a game that isn't super stale and as soviets, it's pretttttttttttttttttttttttttty stale right now. Well, as most armies it is pretty stale tbh.