your opponent will rush either kubel or 222 when he sees commander + ribbon combos, and as you've gone t1 you won't be able to stop it from killing sniper unless he hits a lucky mine outside base
I cant agree with you on this statement, I have been using snipers for a while now and an early kubel means you have an easy unit to kill. I have used sniper in 1v1 and 3v3 building T1 then sniper into clown car. Nobody rushes the kubel to the enemy back line on the possible if and or maybe sniper. Usually Kubel is used to back tech while Sturm is rushed to enemy cutoff or important strategic point. Sniper is used in conjuction with Engi to snipe off any units. By the time the sniper is built enough fuel is saved to buy clown car which will chase down Kubel. At this point OKW is at a massive disadvantage since the slow T1 start no longer matters. You are down a unit while they can now start to pump out cons or Penals depending on play style/commander.
Also I am assuming you are talking about rushing out a 221 because rushing out a 222 still arrives around the 5 min mark which is plenty of time for Guards or PTRS Penals. Either one will scare off the 222 while sniper works on infantry. Now back to the 221, the issue there is your gated by having to get a tech truck first, dont have to set it down but does need to be called in. That means at minimum to not lose to much map control you get out a 2nd Sturm or 2 VG. This lack of presence means sniper has a bit of time to roam free and get some bleed in while pumping out some infantry. A clown car alone can cause quite a bit of damage to the 221, backed up by Penals which fire fairly quickly the T1 player has all they need to keep you at bay let alone rushing a PTRS upgrade and chasing down a 221.
Now we haven't even included commander choice, if the soviet player goes for NKVD tactics like several players were doing for a while the early game is literally in the soviet players favor. The moment certain units hit the field or lack thereof the player can easily come up with a strategy and prioritize upgrades.