Yes, it is fair, since you are given the tools for it.
How is this any different from lets say, early game USF vs OST infantry play? Why does USF have to flank OST HMGs and use smoke or light vehicles to counter them? Why can't they just win in a straight up fight?
Why should OST be able to make a heavy tank and just be able to A move and win, when the faction has Panzerschreks, high DPS AT guns, cheap Stugs, and P4s and Panthers with blitz?
Still if you can't be bothered to use these tools, you can always sit back with your own 70 range heavy tank destroyer and let the Allied player do all the hard flanking stuff.
This not true anymore. In my 2v2, it is much easier for allies infantry to flank/wipe mg and team weapons
Then it is for panther to flank/kill 60td.
That's why so many calls to tone down the oppressive 60td meta