Muhail2 you failed to make any mention of my point about the infantry spreading out as oppossed to crewed weapons which they are good vs & answered your own question.
Quote:A battalion of infantry is a unit fit for any task, while a tank platoon is no more than armor-sweeper. It does it's real-life job of supporting infantry with fire
Quite right note the last sentence, the armour is designed to SUPPORT infantry not go off killing it on its own. Its main role is to take out heavy defences as in buildings fortifications & MGs which is what it does. The main guns are far more effective vs units in cover than rifles LMGs plus the latest patch due out in a couple of days will add casulties due to falling rubble in buildings if its destroyed. This is modelled in the game by warhead size effecting the kill in cover terrain. a modern tank gun warhead 7 vs a rifle LMG warhead 1.
Armour was & always has been designed to support infantry then the Brits tried the Matilda but really the Germans saw the need for Mr Tiger & the hunter killer was born. Prior to this time most tanks were designed as support vehicles first & to take on other tanks as a poor second. The Russian KV for instance despite its armour was a support tank not a tank killer but they saw the need to & along came the T-34.
Now the roles are reversed modern tanks are designed on the whole to kill other tanks first then support infantry. Depending on expected threat you then carry a loadout for infantry support or armour engaghement unless you are a US Marine who keep tanks mainly for infantry support. The modern APC/IFV has evolved so it is capable of taking over the tanks support role letting these very expensive pieces of kit concentrate on killing their kind. Of course as a Marine IFVs tend to be a bit thin on the ground so tanks still fill the role.
As you so rightly stated infantry are the Jack of All Trades & rule the battlefield armour most certainly is not. To see how effective vehicles are in game terms do the following.
An assault vs dug in units with infantry only
Then infantry & a few supporting APCs with MGs only.
Now do it with combined arms so a modern Mech Co & say a platoon of supporting tanks.
In the last case unless doing something wrong you will notice its over far quicker & you took far fewer casulties because of the fire laid down by the vehicles. It is still however as always the infantry that take the ground & finnish the job.
Tanks are rubbish vs men its a fact let them close & you are dead simples. Stick one in an urban situation vs an angry mob armed with nothing but what they pick up & guess which would win eventualy, at huge cost mind the tanks only choice is speed & run.