a. Close with and destroy the enemy.

Hardly primary task, more like the famous exception of the rule.

d. Operations in built up areas, fighting in woods and forests (FIBUA and FIWAF).

Same do armoured forces, recce forces ... nothing special about infantry here other than it's usually better-suited.
Furthermore, note that this is an environment description, while the list began as a task list.

e. Observe and patrol the battlefield especially in conditions of poor visibility and at night.

Especially in conditions of poor visibility!? A MBT is better at that one. Besides, this stuff should be part of (b); control of terrain.

f. Destroy armoured vehicles.

Really? That's more like a self-defence necessity than a real role.

g. Provide flank protection.

...a classic role for faster-than-average troops, and infantry is the slowest branch in combat.

h. Provide integral direct and indirect fire support.

Self-licking ice-cone. That's no task, but part of how to execute a task.

i. Protect vital installations, routes, and communication centres.

There's rarely if ever infantry to spare for this.


I know their manual, and wasn't impressed by ANYTHING in it.
Somebody was tasked to write the thing, wrote it, some general signed it - but no great or especially disciplined mind was involved, for sure.