Tanks wern't to common in the first world war so not too many people would get the chance to drive them in the first place making this conversation completely void
As I said, there won't be too many tanks on a team. This promotes teamwork seeing as people will man the machine guns and such and try to protect the few tanks they have, not to mention a tank makes good cover which means some infantry will stick together even if they don't want to.
One of the biggest problems with fh2 is people are so obsessed with tank whoring that there's not enough infantry to do anything properly and all the tanks do is go on their own little adventure to kill everything they can before being blown up. There's not a lot of teamwork going on in the infantry, at most they just stay relatively close to the squad leader. Spawn waves only made everything worse. If anything, your argument is completely void.