...'grinding', like killing enemies with your intelligence, or killing demomen, and getting caps on payload maps? Did you even read these achievements?
Yes, but it seems like you've decided to only read the ones that make sense.
Iron Kurtain: Take 1000 points of damage in a single life.
Show Trial: Kill an enemy with a taunt.
Redistribution of Health: Heal 1000 damage with med-kits in a single life.
Rationing: Kill an enemy with your shotgun while you're out of minigun ammo.
Soviet Block : While invulnerable and on defense, block an invulnerable enemy Heavy's movement.
Photostroika: Provide an enemy with a freezecam shot of you taunting while invulnerable.
Rasputin: In a single life, get shot, burned, bludgeoned, and receive explosive damage.
Konspicuous Konsumption: Eat 100 sandviches.
Crock Block: Survive a direct hit from a critical rocket.
Krazy Ivan: Kill 100 enemies while both you and your victim are underwater.
Taking certain types of damage isn't achieving anything. Killing someone underwater isn't an achievement, it's just a randomly occurring circumstance. Killing an enemy with a taunt is also not all that beneficial to a team, but only has to be done once. Taunting while invulnerable is a massive waste of a Medic's invuln.